161455442 has 8 divisors (see below), whose sum is σ = 242670000. Its totient is φ = 80565444.

The previous prime is 161455429. The next prime is 161455513. The reversal of 161455442 is 244554161.

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

It is a super-3 number, since 3×161455442³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161455399 and 161455408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79892 + ... + 81887.

It is an arithmetic number, because the mean of its divisors is an integer number (30333750).

Almost surely, 2^161455442 is an apocalyptic number.

161455442 is a deficient number, since it is larger than the sum of its proper divisors (81214558).

161455442 is a wasteful number, since it uses less digits than its factorization.

161455442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162280.

The product of its digits is 19200, while the sum is 32.

The square root of 161455442 is about 12706.5117951387. The cubic root of 161455442 is about 544.5246726728.

The spelling of 161455442 in words is "one hundred sixty-one million, four hundred fifty-five thousand, four hundred forty-two".