25909642 has 8 divisors (see below), whose sum is σ = 42397632. Its totient is φ = 11777100.

The previous prime is 25909613. The next prime is 25909679. The reversal of 25909642 is 24690952.

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

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, 588834 + ... + 588877.

It is an arithmetic number, because the mean of its divisors is an integer number (5299704).

Almost surely, 2^25909642 is an apocalyptic number.

25909642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25909642 is a deficient number, since it is larger than the sum of its proper divisors (16487990).

25909642 is a wasteful number, since it uses less digits than its factorization.

25909642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177724.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 25909642 is about 5090.1514712236. The cubic root of 25909642 is about 295.9060223330.

The spelling of 25909642 in words is "twenty-five million, nine hundred nine thousand, six hundred forty-two".