25494720 has 56 divisors (see below), whose sum is σ = 80948784. Its totient is φ = 6798336.

The previous prime is 25494709. The next prime is 25494731. The reversal of 25494720 is 2749452.

It is an interprime number because it is at equal distance from previous prime (25494709) and next prime (25494731).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12319 + ... + 14238.

It is an arithmetic number, because the mean of its divisors is an integer number (1445514).

Almost surely, 2^25494720 is an apocalyptic number.

25494720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25494720 is an abundant number, since it is smaller than the sum of its proper divisors (55454064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25494720 is a wasteful number, since it uses less digits than its factorization.

25494720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26577 (or 26567 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 25494720 is about 5049.2296442131. The cubic root of 25494720 is about 294.3179493302.

The spelling of 25494720 in words is "twenty-five million, four hundred ninety-four thousand, seven hundred twenty".