161871260 has 24 divisors (see below), whose sum is σ = 357821520. Its totient is φ = 61340544.

The previous prime is 161871253. The next prime is 161871277. The reversal of 161871260 is 62178161.

It is a happy number.

It is a congruent number.

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, 212609 + ... + 213368.

It is an arithmetic number, because the mean of its divisors is an integer number (14909230).

Almost surely, 2^161871260 is an apocalyptic number.

161871260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161871260 is an abundant number, since it is smaller than the sum of its proper divisors (195950260).

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

161871260 is a wasteful number, since it uses less digits than its factorization.

161871260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426005 (or 426003 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 161871260 is about 12722.8636713595. The cubic root of 161871260 is about 544.9917345771.

The spelling of 161871260 in words is "one hundred sixty-one million, eight hundred seventy-one thousand, two hundred sixty".