161125419 has 64 divisors (see below), whose sum is σ = 280756224. Its totient is φ = 79871616.

The previous prime is 161125403. The next prime is 161125423. The reversal of 161125419 is 914521161.

It is not a de Polignac number, because 161125419 - 2⁴ = 161125403 is a prime.

It is a super-2 number, since 2×161125419² = 51922801295851122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161125469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 420502 + ... + 420884.

It is an arithmetic number, because the mean of its divisors is an integer number (4386816).

Almost surely, 2^161125419 is an apocalyptic number.

161125419 is a deficient number, since it is larger than the sum of its proper divisors (119630805).

161125419 is a wasteful number, since it uses less digits than its factorization.

161125419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496.

The product of its digits is 2160, while the sum is 30.

The square root of 161125419 is about 12693.5187792826. The cubic root of 161125419 is about 544.1534077064.

The spelling of 161125419 in words is "one hundred sixty-one million, one hundred twenty-five thousand, four hundred nineteen".