621266442 has 8 divisors (see below), whose sum is σ = 1242532896. Its totient is φ = 207088812.

The previous prime is 621266441. The next prime is 621266447. The reversal of 621266442 is 244662126.

It is a sphenic number, since it is the product of 3 distinct primes.

621266442 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (621266441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51772198 + ... + 51772209.

It is an arithmetic number, because the mean of its divisors is an integer number (155316612).

Almost surely, 2^621266442 is an apocalyptic number.

621266442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

621266442 is a wasteful number, since it uses less digits than its factorization.

621266442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103544412.

The product of its digits is 27648, while the sum is 33.

The square root of 621266442 is about 24925.2169900284. The cubic root of 621266442 is about 853.2820935148.

The spelling of 621266442 in words is "six hundred twenty-one million, two hundred sixty-six thousand, four hundred forty-two".