25421386 has 4 divisors (see below), whose sum is σ = 38132082. Its totient is φ = 12710692.

The previous prime is 25421369. The next prime is 25421387. The reversal of 25421386 is 68312452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 670761 = 4975^2 + 819^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25421387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6355345 + ... + 6355348.

Almost surely, 2^25421386 is an apocalyptic number.

25421386 is a deficient number, since it is larger than the sum of its proper divisors (12710696).

25421386 is a wasteful number, since it uses less digits than its factorization.

25421386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12710695.

The product of its digits is 11520, while the sum is 31.

The square root of 25421386 is about 5041.9625147357. The cubic root of 25421386 is about 294.0354824746.

The spelling of 25421386 in words is "twenty-five million, four hundred twenty-one thousand, three hundred eighty-six".