621478242 has 48 divisors (see below), whose sum is σ = 1678802112. Its totient is φ = 161422560.

The previous prime is 621478241. The next prime is 621478243. The reversal of 621478242 is 242874126.

621478242 is a `hidden beast` number, since 621 + 4 + 7 + 8 + 24 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (621478241) and next prime (621478243).

It is a junction number, because it is equal to n+sod(n) for n = 621478197 and 621478206.

It is not an unprimeable number, because it can be changed into a prime (621478241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222813 + ... + 225584.

It is an arithmetic number, because the mean of its divisors is an integer number (34975044).

Almost surely, 2^621478242 is an apocalyptic number.

621478242 is an abundant number, since it is smaller than the sum of its proper divisors (1057323870).

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

621478242 is a wasteful number, since it uses less digits than its factorization.

621478242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448423 (or 448420 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 621478242 is about 24929.4653372269. The cubic root of 621478242 is about 853.3790484881.

The spelling of 621478242 in words is "six hundred twenty-one million, four hundred seventy-eight thousand, two hundred forty-two".