161974501 has 12 divisors (see below), whose sum is σ = 177876000. Its totient is φ = 147398160.

The previous prime is 161974481. The next prime is 161974511. The reversal of 161974501 is 105479161.

161974501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161974501 - 2¹³ = 161966309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161974511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5250 + ... + 18748.

It is an arithmetic number, because the mean of its divisors is an integer number (14823000).

Almost surely, 2^161974501 is an apocalyptic number.

It is an amenable number.

161974501 is a deficient number, since it is larger than the sum of its proper divisors (15901499).

161974501 is a wasteful number, since it uses less digits than its factorization.

161974501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596 (or 13583 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 161974501 is about 12726.9203266148. The cubic root of 161974501 is about 545.1075746464.

The spelling of 161974501 in words is "one hundred sixty-one million, nine hundred seventy-four thousand, five hundred one".