621259942 has 4 divisors (see below), whose sum is σ = 931889916. Its totient is φ = 310629970.

The previous prime is 621259931. The next prime is 621259949. The reversal of 621259942 is 249952126.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 621259895 and 621259904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621259949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155314984 + ... + 155314987.

It is an arithmetic number, because the mean of its divisors is an integer number (232972479).

Almost surely, 2^621259942 is an apocalyptic number.

621259942 is a deficient number, since it is larger than the sum of its proper divisors (310629974).

621259942 is a wasteful number, since it uses less digits than its factorization.

621259942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310629973.

The product of its digits is 77760, while the sum is 40.

The square root of 621259942 is about 24925.0865996490. The cubic root of 621259942 is about 853.2791176832.

The spelling of 621259942 in words is "six hundred twenty-one million, two hundred fifty-nine thousand, nine hundred forty-two".