25402542 has 32 divisors (see below), whose sum is σ = 55603584. Its totient is φ = 7672800.

The previous prime is 25402541. The next prime is 25402571. The reversal of 25402542 is 24520452.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25402541) 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 15 ways as a sum of consecutive naturals, for example, 36417 + ... + 37107.

It is an arithmetic number, because the mean of its divisors is an integer number (1737612).

Almost surely, 2^25402542 is an apocalyptic number.

25402542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25402542 is an abundant number, since it is smaller than the sum of its proper divisors (30201042).

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

25402542 is a wasteful number, since it uses less digits than its factorization.

25402542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 25402542 is about 5040.0934515146. The cubic root of 25402542 is about 293.9628117153.

Adding to 25402542 its reverse (24520452), we get a palindrome (49922994).

The spelling of 25402542 in words is "twenty-five million, four hundred two thousand, five hundred forty-two".