621426641 has 8 divisors (see below), whose sum is σ = 679070304. Its totient is φ = 563974720.

The previous prime is 621426629. The next prime is 621426647. The reversal of 621426641 is 146624126.

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

It is a cyclic number.

It is not a de Polignac number, because 621426641 - 2¹⁸ = 621164497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 621426598 and 621426607.

It is not an unprimeable number, because it can be changed into a prime (621426647) 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, 41111 + ... + 54156.

It is an arithmetic number, because the mean of its divisors is an integer number (84883788).

Almost surely, 2^621426641 is an apocalyptic number.

It is an amenable number.

621426641 is a deficient number, since it is larger than the sum of its proper divisors (57643663).

621426641 is a wasteful number, since it uses less digits than its factorization.

621426641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95871.

The product of its digits is 13824, while the sum is 32.

The square root of 621426641 is about 24928.4303757778. The cubic root of 621426641 is about 853.3554293018.

The spelling of 621426641 in words is "six hundred twenty-one million, four hundred twenty-six thousand, six hundred forty-one".