621052045 has 4 divisors (see below), whose sum is σ = 745262460. Its totient is φ = 496841632.

The previous prime is 621052037. The next prime is 621052073. The reversal of 621052045 is 540250126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 320445801 + 300606244 = 17901^2 + 17338^2 .

It is a cyclic number.

It is not a de Polignac number, because 621052045 - 2³ = 621052037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62105200 + ... + 62105209.

It is an arithmetic number, because the mean of its divisors is an integer number (186315615).

Almost surely, 2^621052045 is an apocalyptic number.

It is an amenable number.

621052045 is a deficient number, since it is larger than the sum of its proper divisors (124210415).

621052045 is a wasteful number, since it uses less digits than its factorization.

621052045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124210414.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 621052045 is about 24920.9158138300. The cubic root of 621052045 is about 853.1839272763.

The spelling of 621052045 in words is "six hundred twenty-one million, fifty-two thousand, forty-five".