161123254 has 8 divisors (see below), whose sum is σ = 241739280. Its totient is φ = 80543496.

The previous prime is 161123251. The next prime is 161123267. The reversal of 161123254 is 452321161.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161123251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10407 + ... + 20749.

It is an arithmetic number, because the mean of its divisors is an integer number (30217410).

Almost surely, 2^161123254 is an apocalyptic number.

161123254 is a deficient number, since it is larger than the sum of its proper divisors (80616026).

161123254 is a wasteful number, since it uses less digits than its factorization.

161123254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18134.

The product of its digits is 1440, while the sum is 25.

The square root of 161123254 is about 12693.4334992546. The cubic root of 161123254 is about 544.1509704800.

The spelling of 161123254 in words is "one hundred sixty-one million, one hundred twenty-three thousand, two hundred fifty-four".