161272042 has 8 divisors (see below), whose sum is σ = 241971876. Its totient is φ = 80614752.

The previous prime is 161272031. The next prime is 161272043. The reversal of 161272042 is 240272161.

161272042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 148376761 + 12895281 = 12181^2 + 3591^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 161271998 and 161272016.

It is not an unprimeable number, because it can be changed into a prime (161272043) 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, 1708 + ... + 18040.

Almost surely, 2^161272042 is an apocalyptic number.

161272042 is a deficient number, since it is larger than the sum of its proper divisors (80699834).

161272042 is a wasteful number, since it uses less digits than its factorization.

161272042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21272.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 161272042 is about 12699.2929724454. The cubic root of 161272042 is about 544.3184162578.

The spelling of 161272042 in words is "one hundred sixty-one million, two hundred seventy-two thousand, forty-two".