242860621 has 2 divisors, whose sum is σ = 242860622. Its totient is φ = 242860620.

The previous prime is 242860591. The next prime is 242860627. The reversal of 242860621 is 126068242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122102500 + 120758121 = 11050^2 + 10989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242860621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242860627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121430310 + 121430311.

It is an arithmetic number, because the mean of its divisors is an integer number (121430311).

Almost surely, 2^242860621 is an apocalyptic number.

It is an amenable number.

242860621 is a deficient number, since it is larger than the sum of its proper divisors (1).

242860621 is an equidigital number, since it uses as much as digits as its factorization.

242860621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 242860621 is about 15583.9860433716. The cubic root of 242860621 is about 623.9058154542.

The spelling of 242860621 in words is "two hundred forty-two million, eight hundred sixty thousand, six hundred twenty-one".