25581072 has 40 divisors (see below), whose sum is σ = 72093600. Its totient is φ = 7751680.

The previous prime is 25581067. The next prime is 25581077. The reversal of 25581072 is 27018552.

It is an interprime number because it is at equal distance from previous prime (25581067) and next prime (25581077).

It is not an unprimeable number, because it can be changed into a prime (25581077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23697 + ... + 24752.

It is an arithmetic number, because the mean of its divisors is an integer number (1802340).

Almost surely, 2^25581072 is an apocalyptic number.

25581072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25581072 is an abundant number, since it is smaller than the sum of its proper divisors (46512528).

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

25581072 is a wasteful number, since it uses less digits than its factorization.

25581072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48471 (or 48465 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 25581072 is about 5057.7734231577. The cubic root of 25581072 is about 294.6498651609.

The spelling of 25581072 in words is "twenty-five million, five hundred eighty-one thousand, seventy-two".