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2507 = 23109

2507 has 4 divisors (see below), whose sum is σ = 2640. Its totient is φ = 2376.

The previous prime is 2503. The next prime is 2521. The reversal of 2507 is 7052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2507 - 22 = 2503 is a prime.

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

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 14 and base 15.

It is a junction number, because it is equal to n+sod(n) for n = 2491 and 2500.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32 + ... + 77.

It is an arithmetic number, because the mean of its divisors is an integer number (660).

2507 is a Friedman number, since it can be written as 50^2+7, using all its digits and the basic arithmetic operations.

22507 is an apocalyptic number.

2507 is a deficient number, since it is larger than the sum of its proper divisors (133).

2507 is a wasteful number, since it uses less digits than its factorization.

2507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132.

The product of its (nonzero) digits is 70, while the sum is 14.

The square root of 2507 is about 50.0699510685. The cubic root of 2507 is about 13.5847435607.

Adding to 2507 its reverse (7052), we get a palindrome (9559).

The spelling of 2507 in words is "two thousand, five hundred seven".

Divisors: 1 23 109 2507