25542369 has 12 divisors (see below), whose sum is σ = 36958116. Its totient is φ = 16998912.

The previous prime is 25542329. The next prime is 25542371. The reversal of 25542369 is 96324552.

25542369 is a `hidden beast` number, since 255 + 42 + 369 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16160400 + 9381969 = 4020^2 + 3063^2 .

It is not a de Polignac number, because 25542369 - 2¹³ = 25534177 is a prime.

It is a super-2 number, since 2×25542369² = 1304825228264322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25542329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3949 + ... + 8165.

It is an arithmetic number, because the mean of its divisors is an integer number (3079843).

Almost surely, 2^25542369 is an apocalyptic number.

It is an amenable number.

25542369 is a deficient number, since it is larger than the sum of its proper divisors (11415747).

25542369 is a wasteful number, since it uses less digits than its factorization.

25542369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896 (or 4893 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 25542369 is about 5053.9458841582. The cubic root of 25542369 is about 294.5011928700.

It can be divided in two parts, 255 and 42369, that added together give a palindrome (42624).

The spelling of 25542369 in words is "twenty-five million, five hundred forty-two thousand, three hundred sixty-nine".