25421870 has 8 divisors (see below), whose sum is σ = 45759384. Its totient is φ = 10168744.

The previous prime is 25421839. The next prime is 25421899. The reversal of 25421870 is 7812452.

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

It is a congruent number.

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, 1271084 + ... + 1271103.

It is an arithmetic number, because the mean of its divisors is an integer number (5719923).

Almost surely, 2^25421870 is an apocalyptic number.

25421870 is a deficient number, since it is larger than the sum of its proper divisors (20337514).

25421870 is a wasteful number, since it uses less digits than its factorization.

25421870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542194.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 25421870 is about 5042.0105116907. The cubic root of 25421870 is about 294.0373485185.

The spelling of 25421870 in words is "twenty-five million, four hundred twenty-one thousand, eight hundred seventy".