242156645 has 4 divisors (see below), whose sum is σ = 290587980. Its totient is φ = 193725312.

The previous prime is 242156639. The next prime is 242156659. The reversal of 242156645 is 546651242.

242156645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49252324 + 192904321 = 7018^2 + 13889^2 .

It is a cyclic number.

It is not a de Polignac number, because 242156645 - 2⁸ = 242156389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24215660 + ... + 24215669.

It is an arithmetic number, because the mean of its divisors is an integer number (72646995).

Almost surely, 2^242156645 is an apocalyptic number.

It is an amenable number.

242156645 is a deficient number, since it is larger than the sum of its proper divisors (48431335).

242156645 is an equidigital number, since it uses as much as digits as its factorization.

242156645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48431334.

The product of its digits is 57600, while the sum is 35.

The square root of 242156645 is about 15561.3831326139. The cubic root of 242156645 is about 623.3023969382.

The spelling of 242156645 in words is "two hundred forty-two million, one hundred fifty-six thousand, six hundred forty-five".