25769491 has 16 divisors (see below), whose sum is σ = 29865600. Its totient is φ = 22172040.

The previous prime is 25769483. The next prime is 25769503. The reversal of 25769491 is 19496752.

It is a happy number.

It is not a de Polignac number, because 25769491 - 2³ = 25769483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25769411) 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, 24780 + ... + 25798.

It is an arithmetic number, because the mean of its divisors is an integer number (1866600).

Almost surely, 2^25769491 is an apocalyptic number.

25769491 is a deficient number, since it is larger than the sum of its proper divisors (4096109).

25769491 is a wasteful number, since it uses less digits than its factorization.

25769491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071 (or 1049 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 25769491 is about 5076.3659245567. The cubic root of 25769491 is about 295.3715169844.

The spelling of 25769491 in words is "twenty-five million, seven hundred sixty-nine thousand, four hundred ninety-one".