621637142 has 16 divisors (see below), whose sum is σ = 1069915392. Its totient is φ = 265353000.

The previous prime is 621637139. The next prime is 621637201. The reversal of 621637142 is 241736126.

It is a junction number, because it is equal to n+sod(n) for n = 621637099 and 621637108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84938 + ... + 91965.

It is an arithmetic number, because the mean of its divisors is an integer number (66869712).

Almost surely, 2^621637142 is an apocalyptic number.

621637142 is a deficient number, since it is larger than the sum of its proper divisors (448278250).

621637142 is a wasteful number, since it uses less digits than its factorization.

621637142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177163.

The product of its digits is 12096, while the sum is 32.

The square root of 621637142 is about 24932.6521252754. The cubic root of 621637142 is about 853.4517731449.

The spelling of 621637142 in words is "six hundred twenty-one million, six hundred thirty-seven thousand, one hundred forty-two".