621791242 has 8 divisors (see below), whose sum is σ = 962773632. Its totient is φ = 300866700.

The previous prime is 621791227. The next prime is 621791257. The reversal of 621791242 is 242197126.

It is an interprime number because it is at equal distance from previous prime (621791227) and next prime (621791257).

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

It is a junction number, because it is equal to n+sod(n) for n = 621791198 and 621791207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5014384 + ... + 5014507.

It is an arithmetic number, because the mean of its divisors is an integer number (120346704).

Almost surely, 2^621791242 is an apocalyptic number.

621791242 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

621791242 is a deficient number, since it is larger than the sum of its proper divisors (340982390).

621791242 is a wasteful number, since it uses less digits than its factorization.

621791242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10028924.

The product of its digits is 12096, while the sum is 34.

The square root of 621791242 is about 24935.7422588541. The cubic root of 621791242 is about 853.5222891225.

The spelling of 621791242 in words is "six hundred twenty-one million, seven hundred ninety-one thousand, two hundred forty-two".