621005434 has 16 divisors (see below), whose sum is σ = 1090547136. Its totient is φ = 259653600.

The previous prime is 621005431. The next prime is 621005467. The reversal of 621005434 is 434500126.

It is a junction number, because it is equal to n+sod(n) for n = 621005399 and 621005408.

It is not an unprimeable number, because it can be changed into a prime (621005431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 540372 + ... + 541519.

It is an arithmetic number, because the mean of its divisors is an integer number (68159196).

Almost surely, 2^621005434 is an apocalyptic number.

621005434 is a deficient number, since it is larger than the sum of its proper divisors (469541702).

621005434 is a wasteful number, since it uses less digits than its factorization.

621005434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081941.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 621005434 is about 24919.9806179700. The cubic root of 621005434 is about 853.1625824463.

The spelling of 621005434 in words is "six hundred twenty-one million, five thousand, four hundred thirty-four".