25517072 has 40 divisors (see below), whose sum is σ = 56948736. Its totient is φ = 10849536.

The previous prime is 25517029. The next prime is 25517083. The reversal of 25517072 is 27071552.

25517072 is nontrivially palindromic in base 15.

It is a super-2 number, since 2×25517072² = 1302241926906368, 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, 14513 + ... + 16175.

Almost surely, 2^25517072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25517072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28474368).

25517072 is an abundant number, since it is smaller than the sum of its proper divisors (31431664).

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

25517072 is a wasteful number, since it uses less digits than its factorization.

25517072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815 (or 1809 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 25517072 is about 5051.4425662379. The cubic root of 25517072 is about 294.4039367188.

The spelling of 25517072 in words is "twenty-five million, five hundred seventeen thousand, seventy-two".