1372961021 has 8 divisors (see below), whose sum is σ = 1454314680. Its totient is φ = 1291673088.

The previous prime is 1372961003. The next prime is 1372961063. The reversal of 1372961021 is 1201692731.

It can be written as a sum of positive squares in 4 ways, for example, as 88096996 + 1284864025 = 9386^2 + 35845^2 .

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 1372961021 - 2²⁶ = 1305852157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1372963021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30425 + ... + 60593.

It is an arithmetic number, because the mean of its divisors is an integer number (181789335).

Almost surely, 2^1372961021 is an apocalyptic number.

It is an amenable number.

1372961021 is a deficient number, since it is larger than the sum of its proper divisors (81353659).

1372961021 is a wasteful number, since it uses less digits than its factorization.

1372961021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32863.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1372961021 is about 37053.4886481691. The cubic root of 1372961021 is about 1111.4401189796.

The spelling of 1372961021 in words is "one billion, three hundred seventy-two million, nine hundred sixty-one thousand, twenty-one".