1572020347 has 6 divisors (see below), whose sum is σ = 1659113268. Its totient is φ = 1489282092.

The previous prime is 1572020339. The next prime is 1572020357. The reversal of 1572020347 is 7430202751.

It is not a de Polignac number, because 1572020347 - 2³ = 1572020339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1572020357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2176953 + ... + 2177674.

It is an arithmetic number, because the mean of its divisors is an integer number (276518878).

Almost surely, 2^1572020347 is an apocalyptic number.

1572020347 is a deficient number, since it is larger than the sum of its proper divisors (87092921).

1572020347 is an equidigital number, since it uses as much as digits as its factorization.

1572020347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354665 (or 4354646 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 1572020347 is about 39648.7117949625. The cubic root of 1572020347 is about 1162.7492131833.

The spelling of 1572020347 in words is "one billion, five hundred seventy-two million, twenty thousand, three hundred forty-seven".