621073121 has 16 divisors (see below), whose sum is σ = 694137600. Its totient is φ = 552238848.

The previous prime is 621073109. The next prime is 621073129. The reversal of 621073121 is 121370126.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621073121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621073129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123176 + ... + 128118.

It is an arithmetic number, because the mean of its divisors is an integer number (43383600).

Almost surely, 2^621073121 is an apocalyptic number.

It is an amenable number.

621073121 is a deficient number, since it is larger than the sum of its proper divisors (73064479).

621073121 is a wasteful number, since it uses less digits than its factorization.

621073121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 621073121 is about 24921.3386678966. The cubic root of 621073121 is about 853.1935783735.

The spelling of 621073121 in words is "six hundred twenty-one million, seventy-three thousand, one hundred twenty-one".