621074145 has 32 divisors (see below), whose sum is σ = 1010103552. Its totient is φ = 325804032.

The previous prime is 621074137. The next prime is 621074159. The reversal of 621074145 is 541470126.

It is not a de Polignac number, because 621074145 - 2³ = 621074137 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 631324 + ... + 632306.

It is an arithmetic number, because the mean of its divisors is an integer number (31565736).

Almost surely, 2^621074145 is an apocalyptic number.

It is an amenable number.

621074145 is a deficient number, since it is larger than the sum of its proper divisors (389029407).

621074145 is a wasteful number, since it uses less digits than its factorization.

621074145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 621074145 is about 24921.3592125309. The cubic root of 621074145 is about 853.1940472769.

The spelling of 621074145 in words is "six hundred twenty-one million, seventy-four thousand, one hundred forty-five".