621502134 has 32 divisors (see below), whose sum is σ = 1387545984. Its totient is φ = 183953280.

The previous prime is 621502073. The next prime is 621502139. The reversal of 621502134 is 431205126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621502139) 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, 106659 + ... + 112334.

It is an arithmetic number, because the mean of its divisors is an integer number (43360812).

Almost surely, 2^621502134 is an apocalyptic number.

621502134 is an abundant number, since it is smaller than the sum of its proper divisors (766043850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621502134 is a wasteful number, since it uses less digits than its factorization.

621502134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219052.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 621502134 is about 24929.9445246074. The cubic root of 621502134 is about 853.3899840659.

The spelling of 621502134 in words is "six hundred twenty-one million, five hundred two thousand, one hundred thirty-four".