25401642 has 16 divisors (see below), whose sum is σ = 58060992. Its totient is φ = 7257600.

The previous prime is 25401631. The next prime is 25401653. The reversal of 25401642 is 24610452.

It is an interprime number because it is at equal distance from previous prime (25401631) and next prime (25401653).

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 7 ways as a sum of consecutive naturals, for example, 302359 + ... + 302442.

It is an arithmetic number, because the mean of its divisors is an integer number (3628812).

Almost surely, 2^25401642 is an apocalyptic number.

25401642 is an abundant number, since it is smaller than the sum of its proper divisors (32659350).

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

25401642 is a wasteful number, since it uses less digits than its factorization.

25401642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604813.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25401642 is about 5040.0041666649. The cubic root of 25401642 is about 293.9593400200.

The spelling of 25401642 in words is "twenty-five million, four hundred one thousand, six hundred forty-two".