25367621 has 4 divisors (see below), whose sum is σ = 26859852. Its totient is φ = 23875392.

The previous prime is 25367599. The next prime is 25367627. The reversal of 25367621 is 12676352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14145121 + 11222500 = 3761^2 + 3350^2 .

It is a cyclic number.

It is not a de Polignac number, because 25367621 - 2⁶ = 25367557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25367627) 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, 746090 + ... + 746123.

It is an arithmetic number, because the mean of its divisors is an integer number (6714963).

Almost surely, 2^25367621 is an apocalyptic number.

It is an amenable number.

25367621 is a deficient number, since it is larger than the sum of its proper divisors (1492231).

25367621 is a wasteful number, since it uses less digits than its factorization.

25367621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492230.

The product of its digits is 15120, while the sum is 32.

The square root of 25367621 is about 5036.6279394055. The cubic root of 25367621 is about 293.8280458988.

The spelling of 25367621 in words is "twenty-five million, three hundred sixty-seven thousand, six hundred twenty-one".