25123000921 has 8 divisors (see below), whose sum is σ = 25501888224. Its totient is φ = 24744228960.

The previous prime is 25123000871. The next prime is 25123000939. The reversal of 25123000921 is 12900032152.

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 25123000921 - 2¹³ = 25122992729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25123010921) 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, 476166 + ... + 526288.

It is an arithmetic number, because the mean of its divisors is an integer number (3187736028).

Almost surely, 2^25123000921 is an apocalyptic number.

25123000921 is the 100246-th heptagonal number.

It is an amenable number.

25123000921 is a deficient number, since it is larger than the sum of its proper divisors (378887303).

25123000921 is an equidigital number, since it uses as much as digits as its factorization.

25123000921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57671.

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 25123000921 in words is "twenty-five billion, one hundred twenty-three million, nine hundred twenty-one", and thus it is an aban number.