161245145 has 8 divisors (see below), whose sum is σ = 194412480. Its totient is φ = 128383920.

The previous prime is 161245121. The next prime is 161245151. The reversal of 161245145 is 541542161.

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

It is not a de Polignac number, because 161245145 - 2¹⁰ = 161244121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75365 + ... + 77474.

It is an arithmetic number, because the mean of its divisors is an integer number (24301560).

Almost surely, 2^161245145 is an apocalyptic number.

It is an amenable number.

161245145 is a deficient number, since it is larger than the sum of its proper divisors (33167335).

161245145 is a wasteful number, since it uses less digits than its factorization.

161245145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153055.

The product of its digits is 4800, while the sum is 29.

The square root of 161245145 is about 12698.2339323230. The cubic root of 161245145 is about 544.2881540453.

The spelling of 161245145 in words is "one hundred sixty-one million, two hundred forty-five thousand, one hundred forty-five".