242146945 has 4 divisors (see below), whose sum is σ = 290576340. Its totient is φ = 193717552.

The previous prime is 242146847. The next prime is 242146987. The reversal of 242146945 is 549641242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549641242 = 2 ⋅274820621.

It can be written as a sum of positive squares in 2 ways, for example, as 190191681 + 51955264 = 13791^2 + 7208^2 .

It is a cyclic number.

It is not a de Polignac number, because 242146945 - 2¹⁵ = 242114177 is a prime.

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, 24214690 + ... + 24214699.

It is an arithmetic number, because the mean of its divisors is an integer number (72644085).

Almost surely, 2^242146945 is an apocalyptic number.

It is an amenable number.

242146945 is a deficient number, since it is larger than the sum of its proper divisors (48429395).

242146945 is an equidigital number, since it uses as much as digits as its factorization.

242146945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48429394.

The product of its digits is 69120, while the sum is 37.

The square root of 242146945 is about 15561.0714605390. The cubic root of 242146945 is about 623.2940743447.

The spelling of 242146945 in words is "two hundred forty-two million, one hundred forty-six thousand, nine hundred forty-five".