161253270 has 48 divisors (see below), whose sum is σ = 420602832. Its totient is φ = 42863040.

The previous prime is 161253269. The next prime is 161253293. The reversal of 161253270 is 72352161.

It is a happy number.

161253270 is a `hidden beast` number, since 1 + 61 + 2 + 532 + 70 = 666.

161253270 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27084 + ... + 32496.

It is an arithmetic number, because the mean of its divisors is an integer number (8762559).

Almost surely, 2^161253270 is an apocalyptic number.

161253270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161253270 is an abundant number, since it is smaller than the sum of its proper divisors (259349562).

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

161253270 is a wasteful number, since it uses less digits than its factorization.

161253270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5757 (or 5754 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 161253270 is about 12698.5538546718. The cubic root of 161253270 is about 544.2972959577.

The spelling of 161253270 in words is "one hundred sixty-one million, two hundred fifty-three thousand, two hundred seventy".