161055242 has 12 divisors (see below), whose sum is σ = 243047670. Its totient is φ = 80040768.

The previous prime is 161055233. The next prime is 161055259. The reversal of 161055242 is 242550161.

It can be written as a sum of positive squares in 3 ways, for example, as 161010721 + 44521 = 12689^2 + 211^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271298 + ... + 271890.

Almost surely, 2^161055242 is an apocalyptic number.

161055242 is a deficient number, since it is larger than the sum of its proper divisors (81992428).

161055242 is an frugal number, since it uses more digits than its factorization.

161055242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 161055242 is about 12690.7541935064. The cubic root of 161055242 is about 544.0743955528.

The spelling of 161055242 in words is "one hundred sixty-one million, fifty-five thousand, two hundred forty-two".