621056241 has 63 divisors (see below), whose sum is σ = 1022697147. Its totient is φ = 376805520.

The previous prime is 621056239. The next prime is 621056251. The reversal of 621056241 is 142650126.

The square root of 621056241 is 24921.

It is a perfect power (a square), and thus also a powerful number.

621056241 is a `hidden beast` number, since 62 + 1 + 0 + 562 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 91872225 + 529184016 = 9585^2 + 23004^2 .

It is not a de Polignac number, because 621056241 - 2¹ = 621056239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (621056221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 8747236 + ... + 8747306.

Almost surely, 2^621056241 is an apocalyptic number.

621056241 is the 24921-st square number.

621056241 is the 12461-st centered octagonal number.

It is an amenable number.

621056241 is a deficient number, since it is larger than the sum of its proper divisors (401640906).

621056241 is an frugal number, since it uses more digits than its factorization.

621056241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The cubic root of 621056241 is about 853.1858487211.

The spelling of 621056241 in words is "six hundred twenty-one million, fifty-six thousand, two hundred forty-one".