621336142 has 16 divisors (see below), whose sum is σ = 1079740512. Its totient is φ = 262638720.

The previous prime is 621336137. The next prime is 621336151. The reversal of 621336142 is 241633126.

It is a self number, because there is not a number n which added to its sum of digits gives 621336142.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 302959 + ... + 305002.

It is an arithmetic number, because the mean of its divisors is an integer number (67483782).

Almost surely, 2^621336142 is an apocalyptic number.

621336142 is a deficient number, since it is larger than the sum of its proper divisors (458404370).

621336142 is a wasteful number, since it uses less digits than its factorization.

621336142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608043.

The product of its digits is 5184, while the sum is 28.

The square root of 621336142 is about 24926.6151332266. The cubic root of 621336142 is about 853.3140022815.

Adding to 621336142 its reverse (241633126), we get a palindrome (862969268).

The spelling of 621336142 in words is "six hundred twenty-one million, three hundred thirty-six thousand, one hundred forty-two".