12737921 has 8 divisors (see below), whose sum is σ = 14913024. Its totient is φ = 10651680.

The previous prime is 12737917. The next prime is 12737951. The reversal of 12737921 is 12973721.

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 12737921 - 2² = 12737917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12737911) 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, 21905 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (1864128).

Almost surely, 2^12737921 is an apocalyptic number.

It is an amenable number.

12737921 is a deficient number, since it is larger than the sum of its proper divisors (2175103).

12737921 is an equidigital number, since it uses as much as digits as its factorization.

12737921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44431.

The product of its digits is 5292, while the sum is 32.

The square root of 12737921 is about 3569.0224151720. The cubic root of 12737921 is about 233.5426391754.

The spelling of 12737921 in words is "twelve million, seven hundred thirty-seven thousand, nine hundred twenty-one".