25155642 has 8 divisors (see below), whose sum is σ = 50311296. Its totient is φ = 8385212.

The previous prime is 25155617. The next prime is 25155649. The reversal of 25155642 is 24655152.

It is a sphenic number, since it is the product of 3 distinct primes.

25155642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (25155649) 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, 2096298 + ... + 2096309.

It is an arithmetic number, because the mean of its divisors is an integer number (6288912).

Almost surely, 2^25155642 is an apocalyptic number.

25155642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25155642 is a wasteful number, since it uses less digits than its factorization.

25155642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192612.

The product of its digits is 12000, while the sum is 30.

The square root of 25155642 is about 5015.5400506825. The cubic root of 25155642 is about 293.0073188696.

The spelling of 25155642 in words is "twenty-five million, one hundred fifty-five thousand, six hundred forty-two".