25715642 has 8 divisors (see below), whose sum is σ = 38610432. Its totient is φ = 12845500.

The previous prime is 25715639. The next prime is 25715671. The reversal of 25715642 is 24651752.

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

It is a super-2 number, since 2×25715642² = 1322588486944328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25715599 and 25715608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3284 + ... + 7887.

It is an arithmetic number, because the mean of its divisors is an integer number (4826304).

Almost surely, 2^25715642 is an apocalyptic number.

25715642 is a deficient number, since it is larger than the sum of its proper divisors (12894790).

25715642 is a wasteful number, since it uses less digits than its factorization.

25715642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12324.

The product of its digits is 16800, while the sum is 32.

The square root of 25715642 is about 5071.0592581827. The cubic root of 25715642 is about 295.1656333085.

The spelling of 25715642 in words is "twenty-five million, seven hundred fifteen thousand, six hundred forty-two".