25899442 has 16 divisors (see below), whose sum is σ = 39354840. Its totient is φ = 12782592.

The previous prime is 25899437. The next prime is 25899469. The reversal of 25899442 is 24499852.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25897921 + 1521 = 5089^2 + 39^2 .

It is a super-2 number, since 2×25899442² = 1341562191822728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88248 + ... + 88540.

Almost surely, 2^25899442 is an apocalyptic number.

25899442 is a deficient number, since it is larger than the sum of its proper divisors (13455398).

25899442 is a wasteful number, since it uses less digits than its factorization.

25899442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its digits is 207360, while the sum is 43.

The square root of 25899442 is about 5089.1494377744. The cubic root of 25899442 is about 295.8671868860.

The spelling of 25899442 in words is "twenty-five million, eight hundred ninety-nine thousand, four hundred forty-two".