1972570021 has 8 divisors (see below), whose sum is σ = 2038176000. Its totient is φ = 1907087520.

The previous prime is 1972570013. The next prime is 1972570031. The reversal of 1972570021 is 1200752791.

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 1972570021 - 2³ = 1972570013 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 (1972570031) 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, 2190 + ... + 62848.

It is an arithmetic number, because the mean of its divisors is an integer number (254772000).

Almost surely, 2^1972570021 is an apocalyptic number.

It is an amenable number.

1972570021 is a deficient number, since it is larger than the sum of its proper divisors (65605979).

1972570021 is a wasteful number, since it uses less digits than its factorization.

1972570021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61739.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 1972570021 is about 44413.6242722883. The cubic root of 1972570021 is about 1254.1345802652.

The spelling of 1972570021 in words is "one billion, nine hundred seventy-two million, five hundred seventy thousand, twenty-one".