621153241 has 2 divisors, whose sum is σ = 621153242. Its totient is φ = 621153240.

The previous prime is 621153217. The next prime is 621153257. The reversal of 621153241 is 142351126.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 599025625 + 22127616 = 24475^2 + 4704^2 .

It is a cyclic number.

It is not a de Polignac number, because 621153241 - 2²⁷ = 486935513 is a prime.

It is not a weakly prime, because it can be changed into another prime (621153271) 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 as a sum of consecutive naturals, namely, 310576620 + 310576621.

It is an arithmetic number, because the mean of its divisors is an integer number (310576621).

Almost surely, 2^621153241 is an apocalyptic number.

It is an amenable number.

621153241 is a deficient number, since it is larger than the sum of its proper divisors (1).

621153241 is an equidigital number, since it uses as much as digits as its factorization.

621153241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 621153241 is about 24922.9460738493. The cubic root of 621153241 is about 853.2302648376.

It can be divided in two parts, 62115 and 3241, that added together give a palindrome (65356).

The spelling of 621153241 in words is "six hundred twenty-one million, one hundred fifty-three thousand, two hundred forty-one".