2505537 has 6 divisors (see below), whose sum is σ = 3619122. Its totient is φ = 1670352.

The previous prime is 2505533. The next prime is 2505539. The reversal of 2505537 is 7355052.

It can be written as a sum of positive squares in only one way, i.e., 2187441 + 318096 = 1479^2 + 564^2 .

It is not a de Polignac number, because 2505537 - 2² = 2505533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2505537.

It is not an unprimeable number, because it can be changed into a prime (2505533) 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, 139188 + ... + 139205.

It is an arithmetic number, because the mean of its divisors is an integer number (603187).

2^2505537 is an apocalyptic number.

It is an amenable number.

2505537 is a deficient number, since it is larger than the sum of its proper divisors (1113585).

2505537 is a wasteful number, since it uses less digits than its factorization.

2505537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278399 (or 278396 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 2505537 is about 1582.8888147940. Note that the first 4 decimals coincide. The cubic root of 2505537 is about 135.8210051499.

The spelling of 2505537 in words is "two million, five hundred five thousand, five hundred thirty-seven".