161245170 has 48 divisors (see below), whose sum is σ = 443902680. Its totient is φ = 40468992.

The previous prime is 161245159. The next prime is 161245177. The reversal of 161245170 is 71542161.

It is a happy number.

161245170 is a `hidden beast` number, since 1 + 612 + 45 + 1 + 7 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 158080329 + 3164841 = 12573^2 + 1779^2 .

It is not an unprimeable number, because it can be changed into a prime (161245177) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51165 + ... + 54224.

Almost surely, 2^161245170 is an apocalyptic number.

161245170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161245170 is an abundant number, since it is smaller than the sum of its proper divisors (282657510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161245170 is a wasteful number, since it uses less digits than its factorization.

161245170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105419 (or 105416 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 161245170 is about 12698.2349167118. The cubic root of 161245170 is about 544.2881821747.

The spelling of 161245170 in words is "one hundred sixty-one million, two hundred forty-five thousand, one hundred seventy".