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2501 = 4161

2501 has 4 divisors (see below), whose sum is σ = 2604. Its totient is φ = 2400.

The previous prime is 2477. The next prime is 2503. The reversal of 2501 is 1052.

2501 is nontrivially palindromic in base 15.

2501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 502+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 100 + 2401 = 10^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501 - 26 = 2437 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

2501 is an undulating number in base 15.

It is a Curzon number.

It is a plaindrome in base 9.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11 + ... + 71.

It is an arithmetic number, because the mean of its divisors is an integer number (651).

2501 is a Friedman number, since it can be written as 50^2+1, using all its digits and the basic arithmetic operations.

22501 is an apocalyptic number.

2501 is the 41-st pentagonal number.

It is an amenable number.

2501 is a deficient number, since it is larger than the sum of its proper divisors (103).

2501 is an equidigital number, since it uses as much as digits as its factorization.

2501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102.

The product of its (nonzero) digits is 10, while the sum is 8.

The square root of 2501 is about 50.0099990002. The cubic root of 2501 is about 13.5738974535.

Adding to 2501 its reverse (1052), we get a palindrome (3553).

The spelling of 2501 in words is "two thousand, five hundred one".

Divisors: 1 41 61 2501