621366042 has 32 divisors (see below), whose sum is σ = 1366401024. Its totient is φ = 186807600.

The previous prime is 621366037. The next prime is 621366043. The reversal of 621366042 is 240663126.

It is not an unprimeable number, because it can be changed into a prime (621366043) 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, 28684 + ... + 45447.

It is an arithmetic number, because the mean of its divisors is an integer number (42700032).

Almost surely, 2^621366042 is an apocalyptic number.

621366042 is an abundant number, since it is smaller than the sum of its proper divisors (745034982).

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

621366042 is a wasteful number, since it uses less digits than its factorization.

621366042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74274.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 621366042 is about 24927.2148865452. The cubic root of 621366042 is about 853.3276898159.

It can be divided in two parts, 621 and 366042, that added together give a palindrome (366663).

The spelling of 621366042 in words is "six hundred twenty-one million, three hundred sixty-six thousand, forty-two".