621520041 has 8 divisors (see below), whose sum is σ = 833323680. Its totient is φ = 412031552.

The previous prime is 621520021. The next prime is 621520063. The reversal of 621520041 is 140025126.

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 621520041 - 2¹⁴ = 621503657 is a prime.

It is a super-2 number, since 2×621520041² = 772574322729283362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621520021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578160 + ... + 579233.

It is an arithmetic number, because the mean of its divisors is an integer number (104165460).

Almost surely, 2^621520041 is an apocalyptic number.

It is an amenable number.

621520041 is a deficient number, since it is larger than the sum of its proper divisors (211803639).

621520041 is a wasteful number, since it uses less digits than its factorization.

621520041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157575.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 621520041 is about 24930.3036684273. The cubic root of 621520041 is about 853.3981800730.

Adding to 621520041 its reverse (140025126), we get a palindrome (761545167).

The spelling of 621520041 in words is "six hundred twenty-one million, five hundred twenty thousand, forty-one".