25274721 has 8 divisors (see below), whose sum is σ = 33926400. Its totient is φ = 16736432.

The previous prime is 25274713. The next prime is 25274729. The reversal of 25274721 is 12747252.

It is an interprime number because it is at equal distance from previous prime (25274713) and next prime (25274729).

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

It is a cyclic number.

It is not a de Polignac number, because 25274721 - 2³ = 25274713 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (25274729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27825 + ... + 28718.

It is an arithmetic number, because the mean of its divisors is an integer number (4240800).

Almost surely, 2^25274721 is an apocalyptic number.

It is an amenable number.

25274721 is a deficient number, since it is larger than the sum of its proper divisors (8651679).

25274721 is a wasteful number, since it uses less digits than its factorization.

25274721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56695.

The product of its digits is 7840, while the sum is 30.

The square root of 25274721 is about 5027.3970402187. The cubic root of 25274721 is about 293.4689264941.

The spelling of 25274721 in words is "twenty-five million, two hundred seventy-four thousand, seven hundred twenty-one".