161142445 has 16 divisors (see below), whose sum is σ = 196213248. Its totient is φ = 127033920.

The previous prime is 161142427. The next prime is 161142451. The reversal of 161142445 is 544241161.

It is not a de Polignac number, because 161142445 - 2²³ = 152753837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102052 + ... + 103618.

It is an arithmetic number, because the mean of its divisors is an integer number (12263328).

Almost surely, 2^161142445 is an apocalyptic number.

It is an amenable number.

161142445 is a deficient number, since it is larger than the sum of its proper divisors (35070803).

161142445 is a wasteful number, since it uses less digits than its factorization.

161142445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860.

The product of its digits is 3840, while the sum is 28.

The square root of 161142445 is about 12694.1894187853. The cubic root of 161142445 is about 544.1725737897.

The spelling of 161142445 in words is "one hundred sixty-one million, one hundred forty-two thousand, four hundred forty-five".