1320672021 has 8 divisors (see below), whose sum is σ = 1789763424. Its totient is φ = 866014320.

The previous prime is 1320671971. The next prime is 1320672037. The reversal of 1320672021 is 1202760231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320672021 - 2³⁰ = 246930197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320671982 and 1320672000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320672091) 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, 3608211 + ... + 3608576.

It is an arithmetic number, because the mean of its divisors is an integer number (223720428).

Almost surely, 2^1320672021 is an apocalyptic number.

It is an amenable number.

1320672021 is a deficient number, since it is larger than the sum of its proper divisors (469091403).

1320672021 is an equidigital number, since it uses as much as digits as its factorization.

1320672021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7216851.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1320672021 is about 36341.0514569956. The cubic root of 1320672021 is about 1097.1474357317.

The spelling of 1320672021 in words is "one billion, three hundred twenty million, six hundred seventy-two thousand, twenty-one".