25757949 has 16 divisors (see below), whose sum is σ = 39838208. Its totient is φ = 14498352.

The previous prime is 25757933. The next prime is 25757981. The reversal of 25757949 is 94975752.

It is not a de Polignac number, because 25757949 - 2⁴ = 25757933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25757898 and 25757907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25757909) 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, 7747 + ... + 10560.

It is an arithmetic number, because the mean of its divisors is an integer number (2489888).

Almost surely, 2^25757949 is an apocalyptic number.

It is an amenable number.

25757949 is a deficient number, since it is larger than the sum of its proper divisors (14080259).

25757949 is a wasteful number, since it uses less digits than its factorization.

25757949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18384.

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

The square root of 25757949 is about 5075.2289603524. The cubic root of 25757949 is about 295.3274120238.

The spelling of 25757949 in words is "twenty-five million, seven hundred fifty-seven thousand, nine hundred forty-nine".