25532400 has 60 divisors (see below), whose sum is σ = 81792632. Its totient is φ = 6808320.

The previous prime is 25532399. The next prime is 25532401. The reversal of 25532400 is 423552.

It is an interprime number because it is at equal distance from previous prime (25532399) and next prime (25532401).

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25532401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9439 + ... + 11838.

Almost surely, 2^25532400 is an apocalyptic number.

25532400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25532400 is an abundant number, since it is smaller than the sum of its proper divisors (56260232).

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

25532400 is a wasteful number, since it uses less digits than its factorization.

25532400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21298 (or 21287 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 25532400 is about 5052.9595288306. The cubic root of 25532400 is about 294.4628739964.

Adding to 25532400 its reverse (423552), we get a palindrome (25955952).

The spelling of 25532400 in words is "twenty-five million, five hundred thirty-two thousand, four hundred".