164600042 has 4 divisors (see below), whose sum is σ = 246900066. Its totient is φ = 82300020.

The previous prime is 164599999. The next prime is 164600053. The reversal of 164600042 is 240006461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240006461 = 19 ⋅12631919.

It can be written as a sum of positive squares in only one way, i.e., 151560721 + 13039321 = 12311^2 + 3611^2 .

It is a junction number, because it is equal to n+sod(n) for n = 164599990 and 164600017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41150009 + ... + 41150012.

Almost surely, 2^164600042 is an apocalyptic number.

164600042 is a deficient number, since it is larger than the sum of its proper divisors (82300024).

164600042 is an equidigital number, since it uses as much as digits as its factorization.

164600042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82300023.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 164600042 is about 12829.6547888086. The cubic root of 164600042 is about 548.0371265272.

The spelling of 164600042 in words is "one hundred sixty-four million, six hundred thousand, forty-two".