161132412 has 24 divisors (see below), whose sum is σ = 429686656. Its totient is φ = 46037808.

The previous prime is 161132401. The next prime is 161132417. The reversal of 161132412 is 214231161.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161132417) by changing a digit.

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, 959038 + ... + 959205.

Almost surely, 2^161132412 is an apocalyptic number.

161132412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161132412 is an abundant number, since it is smaller than the sum of its proper divisors (268554244).

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

161132412 is a wasteful number, since it uses less digits than its factorization.

161132412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918257 (or 1918255 counting only the distinct ones).

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

The square root of 161132412 is about 12693.7942318284. The cubic root of 161132412 is about 544.1612798550.

Adding to 161132412 its reverse (214231161), we get a palindrome (375363573).

The spelling of 161132412 in words is "one hundred sixty-one million, one hundred thirty-two thousand, four hundred twelve".