25524989 has 4 divisors (see below), whose sum is σ = 29171424. Its totient is φ = 21878556.

The previous prime is 25524977. The next prime is 25524991. The reversal of 25524989 is 98942552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25524989 - 2¹⁶ = 25459453 is a prime.

It is a super-3 number, since 3×25524989³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25524689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1823207 + ... + 1823220.

It is an arithmetic number, because the mean of its divisors is an integer number (7292856).

Almost surely, 2^25524989 is an apocalyptic number.

It is an amenable number.

25524989 is a deficient number, since it is larger than the sum of its proper divisors (3646435).

25524989 is an equidigital number, since it uses as much as digits as its factorization.

25524989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646434.

The product of its digits is 259200, while the sum is 44.

The square root of 25524989 is about 5052.2261429987. The cubic root of 25524989 is about 294.4343811072.

The spelling of 25524989 in words is "twenty-five million, five hundred twenty-four thousand, nine hundred eighty-nine".