25977945 has 16 divisors (see below), whose sum is σ = 47502720. Its totient is φ = 11875584.

The previous prime is 25977937. The next prime is 25977949. The reversal of 25977945 is 54977952.

It is not a de Polignac number, because 25977945 - 2³ = 25977937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25977894 and 25977903.

It is not an unprimeable number, because it can be changed into a prime (25977949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123600 + ... + 123809.

It is an arithmetic number, because the mean of its divisors is an integer number (2968920).

Almost surely, 2^25977945 is an apocalyptic number.

It is an amenable number.

25977945 is a deficient number, since it is larger than the sum of its proper divisors (21524775).

25977945 is a wasteful number, since it uses less digits than its factorization.

25977945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247424.

The product of its digits is 793800, while the sum is 48.

The square root of 25977945 is about 5096.8563840862. The cubic root of 25977945 is about 296.1658166687.

The spelling of 25977945 in words is "twenty-five million, nine hundred seventy-seven thousand, nine hundred forty-five".