161315242 has 8 divisors (see below), whose sum is σ = 263970432. Its totient is φ = 73325100.

The previous prime is 161315239. The next prime is 161315243. The reversal of 161315242 is 242513161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161315243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3666234 + ... + 3666277.

It is an arithmetic number, because the mean of its divisors is an integer number (32996304).

Almost surely, 2^161315242 is an apocalyptic number.

161315242 is a deficient number, since it is larger than the sum of its proper divisors (102655190).

161315242 is a wasteful number, since it uses less digits than its factorization.

161315242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332524.

The product of its digits is 1440, while the sum is 25.

The square root of 161315242 is about 12700.9937406488. The cubic root of 161315242 is about 544.3670141755.

The spelling of 161315242 in words is "one hundred sixty-one million, three hundred fifteen thousand, two hundred forty-two".