162990242 has 4 divisors (see below), whose sum is σ = 244485366. Its totient is φ = 81495120.

The previous prime is 162990241. The next prime is 162990251. The reversal of 162990242 is 242099261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242099261 = 17 ⋅14241133.

It can be written as a sum of positive squares in only one way, i.e., 139263601 + 23726641 = 11801^2 + 4871^2 .

It is not an unprimeable number, because it can be changed into a prime (162990241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40747559 + ... + 40747562.

Almost surely, 2^162990242 is an apocalyptic number.

162990242 is a deficient number, since it is larger than the sum of its proper divisors (81495124).

162990242 is an equidigital number, since it uses as much as digits as its factorization.

162990242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81495123.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 162990242 is about 12766.7631763106. The cubic root of 162990242 is about 546.2446563754.

The spelling of 162990242 in words is "one hundred sixty-two million, nine hundred ninety thousand, two hundred forty-two".