161450972 has 24 divisors (see below), whose sum is σ = 303632784. Its totient is φ = 74840832.

The previous prime is 161450929. The next prime is 161450983. The reversal of 161450972 is 279054161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13163 + ... + 22274.

It is an arithmetic number, because the mean of its divisors is an integer number (12651366).

Almost surely, 2^161450972 is an apocalyptic number.

It is an amenable number.

161450972 is a deficient number, since it is larger than the sum of its proper divisors (142181812).

161450972 is a wasteful number, since it uses less digits than its factorization.

161450972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35525 (or 35523 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 161450972 is about 12706.3358998572. The cubic root of 161450972 is about 544.5196474520.

The spelling of 161450972 in words is "one hundred sixty-one million, four hundred fifty thousand, nine hundred seventy-two".