624242261 has 8 divisors (see below), whose sum is σ = 677084184. Its totient is φ = 573191680.

The previous prime is 624242251. The next prime is 624242263. The reversal of 624242261 is 162242426.

624242261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1739761 + 622502500 = 1319^2 + 24950^2 .

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 624242261 - 2²⁶ = 557133397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624242263) 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, 447110 + ... + 448503.

It is an arithmetic number, because the mean of its divisors is an integer number (84635523).

Almost surely, 2^624242261 is an apocalyptic number.

It is an amenable number.

624242261 is a deficient number, since it is larger than the sum of its proper divisors (52841923).

624242261 is a wasteful number, since it uses less digits than its factorization.

624242261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895671.

The product of its digits is 9216, while the sum is 29.

The square root of 624242261 is about 24984.8406238663. The cubic root of 624242261 is about 854.6423094847.

Adding to 624242261 its reverse (162242426), we get a palindrome (786484687).

The spelling of 624242261 in words is "six hundred twenty-four million, two hundred forty-two thousand, two hundred sixty-one".