621424534 has 8 divisors (see below), whose sum is σ = 972664560. Its totient is φ = 297203016.

The previous prime is 621424513. The next prime is 621424537. The reversal of 621424534 is 435424126.

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 = 621424496 and 621424505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621424537) 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, 6754569 + ... + 6754660.

It is an arithmetic number, because the mean of its divisors is an integer number (121583070).

Almost surely, 2^621424534 is an apocalyptic number.

621424534 is a deficient number, since it is larger than the sum of its proper divisors (351240026).

621424534 is a wasteful number, since it uses less digits than its factorization.

621424534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13509254.

The product of its digits is 23040, while the sum is 31.

The square root of 621424534 is about 24928.3881147578. The cubic root of 621424534 is about 853.3544648426.

The spelling of 621424534 in words is "six hundred twenty-one million, four hundred twenty-four thousand, five hundred thirty-four".