161870426 has 8 divisors (see below), whose sum is σ = 243228180. Its totient is φ = 80794368.

The previous prime is 161870411. The next prime is 161870461. The reversal of 161870426 is 624078161.

It can be written as a sum of positive squares in 2 ways, for example, as 161315401 + 555025 = 12701^2 + 745^2 .

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

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, 68981 + ... + 71288.

Almost surely, 2^161870426 is an apocalyptic number.

161870426 is a deficient number, since it is larger than the sum of its proper divisors (81357754).

161870426 is a wasteful number, since it uses less digits than its factorization.

161870426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140848.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 161870426 is about 12722.8308956773. The cubic root of 161870426 is about 544.9907985990.

The spelling of 161870426 in words is "one hundred sixty-one million, eight hundred seventy thousand, four hundred twenty-six".