161142312 has 16 divisors (see below), whose sum is σ = 402855840. Its totient is φ = 53714096.

The previous prime is 161142263. The next prime is 161142323. The reversal of 161142312 is 213241161.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3357108 + ... + 3357155.

It is an arithmetic number, because the mean of its divisors is an integer number (25178490).

Almost surely, 2^161142312 is an apocalyptic number.

161142312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161142312 is an abundant number, since it is smaller than the sum of its proper divisors (241713528).

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

161142312 is a wasteful number, since it uses less digits than its factorization.

161142312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714272 (or 6714268 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 161142312 is about 12694.1841801669. The cubic root of 161142312 is about 544.1724240775.

Adding to 161142312 its reverse (213241161), we get a palindrome (374383473).

The spelling of 161142312 in words is "one hundred sixty-one million, one hundred forty-two thousand, three hundred twelve".