612270021 has 16 divisors (see below), whose sum is σ = 891648000. Its totient is φ = 370625520.

The previous prime is 612270019. The next prime is 612270059. The reversal of 612270021 is 120072216.

It is not a de Polignac number, because 612270021 - 2¹ = 612270019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 612270021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612270091) 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 15 ways as a sum of consecutive naturals, for example, 17730 + ... + 39228.

It is an arithmetic number, because the mean of its divisors is an integer number (55728000).

Almost surely, 2^612270021 is an apocalyptic number.

It is an amenable number.

612270021 is a deficient number, since it is larger than the sum of its proper divisors (279377979).

612270021 is a wasteful number, since it uses less digits than its factorization.

612270021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22376.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 612270021 is about 24744.0906278651. The cubic root of 612270021 is about 849.1433218871.

The spelling of 612270021 in words is "six hundred twelve million, two hundred seventy thousand, twenty-one".