25756545 has 16 divisors (see below), whose sum is σ = 41274432. Its totient is φ = 13715520.

The previous prime is 25756543. The next prime is 25756583. The reversal of 25756545 is 54565752.

It is not a de Polignac number, because 25756545 - 2¹ = 25756543 is a prime.

It is a super-2 number, since 2×25756545² = 1326799220674050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25756543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15610 + ... + 17180.

It is an arithmetic number, because the mean of its divisors is an integer number (2579652).

Almost surely, 2^25756545 is an apocalyptic number.

It is an amenable number.

25756545 is a deficient number, since it is larger than the sum of its proper divisors (15517887).

25756545 is a wasteful number, since it uses less digits than its factorization.

25756545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672.

The product of its digits is 210000, while the sum is 39.

The square root of 25756545 is about 5075.0906395847. The cubic root of 25756545 is about 295.3220460787.

The spelling of 25756545 in words is "twenty-five million, seven hundred fifty-six thousand, five hundred forty-five".