153390242 has 4 divisors (see below), whose sum is σ = 230085366. Its totient is φ = 76695120.

The previous prime is 153390227. The next prime is 153390283. The reversal of 153390242 is 242093351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242093351 = 12721 ⋅19031.

It can be written as a sum of positive squares in only one way, i.e., 149059681 + 4330561 = 12209^2 + 2081^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38347559 + ... + 38347562.

Almost surely, 2^153390242 is an apocalyptic number.

153390242 is a deficient number, since it is larger than the sum of its proper divisors (76695124).

153390242 is an equidigital number, since it uses as much as digits as its factorization.

153390242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76695123.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 153390242 is about 12385.0814288805. The cubic root of 153390242 is about 535.3024661690.

The spelling of 153390242 in words is "one hundred fifty-three million, three hundred ninety thousand, two hundred forty-two".