1372604921 has 4 divisors (see below), whose sum is σ = 1372755600. Its totient is φ = 1372454244.

The previous prime is 1372604899. The next prime is 1372604941. The reversal of 1372604921 is 1294062731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1372604921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1372604941) 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, 60731 + ... + 80208.

It is an arithmetic number, because the mean of its divisors is an integer number (343188900).

Almost surely, 2^1372604921 is an apocalyptic number.

It is an amenable number.

1372604921 is a deficient number, since it is larger than the sum of its proper divisors (150679).

1372604921 is an equidigital number, since it uses as much as digits as its factorization.

1372604921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150678.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1372604921 is about 37048.6831209964. The cubic root of 1372604921 is about 1111.3440205852.

The spelling of 1372604921 in words is "one billion, three hundred seventy-two million, six hundred four thousand, nine hundred twenty-one".