2500101 has 6 divisors (see below), whose sum is σ = 3611270. Its totient is φ = 1666728.

The previous prime is 2500097. The next prime is 2500109. The reversal of 2500101 is 1010052.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 159201 = 1530^2 + 399^2 .

It is not a de Polignac number, because 2500101 - 2² = 2500097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 277789 = 2500101 / (2 + 5 + 0 + 0 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138886 + ... + 138903.

2^2500101 is an apocalyptic number.

It is an amenable number.

2500101 is a deficient number, since it is larger than the sum of its proper divisors (1111169).

2500101 is a wasteful number, since it uses less digits than its factorization.

2500101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277795 (or 277792 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 2500101 is about 1581.1707687660. The cubic root of 2500101 is about 135.7227085130.

Adding to 2500101 its reverse (1010052), we get a palindrome (3510153).

It can be divided in two parts, 2500 and 101, that added together give a square (2601 = 51²).

The spelling of 2500101 in words is "two million, five hundred thousand, one hundred one".