161241672 has 32 divisors (see below), whose sum is σ = 403426080. Its totient is φ = 53704320.

The previous prime is 161241649. The next prime is 161241677. The reversal of 161241672 is 276142161.

It is not an unprimeable number, because it can be changed into a prime (161241677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46147 + ... + 49517.

It is an arithmetic number, because the mean of its divisors is an integer number (12607065).

Almost surely, 2^161241672 is an apocalyptic number.

161241672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161241672 is an abundant number, since it is smaller than the sum of its proper divisors (242184408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161241672 is a wasteful number, since it uses less digits than its factorization.

161241672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5373 (or 5369 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 161241672 is about 12698.0971802865. The cubic root of 161241672 is about 544.2842462763.

The spelling of 161241672 in words is "one hundred sixty-one million, two hundred forty-one thousand, six hundred seventy-two".