161270012 has 6 divisors (see below), whose sum is σ = 282222528. Its totient is φ = 80635004.

The previous prime is 161270009. The next prime is 161270017. The reversal of 161270012 is 210072161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161270017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20158748 + ... + 20158755.

It is an arithmetic number, because the mean of its divisors is an integer number (47037088).

Almost surely, 2^161270012 is an apocalyptic number.

It is an amenable number.

161270012 is a deficient number, since it is larger than the sum of its proper divisors (120952516).

161270012 is a wasteful number, since it uses less digits than its factorization.

161270012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40317507 (or 40317505 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 161270012 is about 12699.2130464844. The cubic root of 161270012 is about 544.3161323922.

The spelling of 161270012 in words is "one hundred sixty-one million, two hundred seventy thousand, twelve".