25682921 has 8 divisors (see below), whose sum is σ = 28775424. Its totient is φ = 22716720.

The previous prime is 25682897. The next prime is 25682957. The reversal of 25682921 is 12928652.

It is a happy number.

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 25682921 - 2⁶ = 25682857 is a prime.

It is a super-2 number, since 2×25682921² = 1319224862184482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25681921) 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, 31145 + ... + 31958.

It is an arithmetic number, because the mean of its divisors is an integer number (3596928).

Almost surely, 2^25682921 is an apocalyptic number.

It is an amenable number.

25682921 is a deficient number, since it is larger than the sum of its proper divisors (3092503).

25682921 is a wasteful number, since it uses less digits than its factorization.

25682921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63151.

The product of its digits is 17280, while the sum is 35.

The square root of 25682921 is about 5067.8319822188. The cubic root of 25682921 is about 295.0403889927.

The spelling of 25682921 in words is "twenty-five million, six hundred eighty-two thousand, nine hundred twenty-one".