25721498 has 16 divisors (see below), whose sum is σ = 43920576. Its totient is φ = 11183040.

The previous prime is 25721461. The next prime is 25721503. The reversal of 25721498 is 89412752.

It is a Curzon number.

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, 24911 + ... + 25922.

It is an arithmetic number, because the mean of its divisors is an integer number (2745036).

Almost surely, 2^25721498 is an apocalyptic number.

25721498 is a deficient number, since it is larger than the sum of its proper divisors (18199078).

25721498 is a wasteful number, since it uses less digits than its factorization.

25721498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50869.

The product of its digits is 40320, while the sum is 38.

The square root of 25721498 is about 5071.6366194750. The cubic root of 25721498 is about 295.1880367774.

The spelling of 25721498 in words is "twenty-five million, seven hundred twenty-one thousand, four hundred ninety-eight".