161897254 has 16 divisors (see below), whose sum is σ = 246328992. Its totient is φ = 79795008.

The previous prime is 161897213. The next prime is 161897257. The reversal of 161897254 is 452798161.

161897254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161897254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161897257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46312 + ... + 49684.

It is an arithmetic number, because the mean of its divisors is an integer number (15395562).

Almost surely, 2^161897254 is an apocalyptic number.

161897254 is a deficient number, since it is larger than the sum of its proper divisors (84431738).

161897254 is a wasteful number, since it uses less digits than its factorization.

161897254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711.

The product of its digits is 120960, while the sum is 43.

The square root of 161897254 is about 12723.8851770990. The cubic root of 161897254 is about 545.0209054069.

The spelling of 161897254 in words is "one hundred sixty-one million, eight hundred ninety-seven thousand, two hundred fifty-four".