25459920 has 100 divisors (see below), whose sum is σ = 88448580. Its totient is φ = 6787584.

The previous prime is 25459877. The next prime is 25459937. The reversal of 25459920 is 2995452.

It is a happy number.

25459920 is a `hidden beast` number, since 2 + 545 + 99 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6170256 + 19289664 = 2484^2 + 4392^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4516 + ... + 8444.

Almost surely, 2^25459920 is an apocalyptic number.

25459920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25459920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44224290).

25459920 is an abundant number, since it is smaller than the sum of its proper divisors (62988660).

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

25459920 is a wasteful number, since it uses less digits than its factorization.

25459920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954 (or 3939 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 25459920 is about 5045.7823972106. The cubic root of 25459920 is about 294.1839748136.

The spelling of 25459920 in words is "twenty-five million, four hundred fifty-nine thousand, nine hundred twenty".