161210946 has 32 divisors (see below), whose sum is σ = 347977728. Its totient is φ = 49495680.

The previous prime is 161210941. The next prime is 161210947. The reversal of 161210946 is 649012161.

It is a happy number.

It is a super-2 number, since 2×161210946² = 51977938220429832, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161210941) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 38655 + ... + 42621.

It is an arithmetic number, because the mean of its divisors is an integer number (10874304).

Almost surely, 2^161210946 is an apocalyptic number.

161210946 is an abundant number, since it is smaller than the sum of its proper divisors (186766782).

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

161210946 is a wasteful number, since it uses less digits than its factorization.

161210946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 161210946 is about 12696.8872563318. The cubic root of 161210946 is about 544.2496713844.

The spelling of 161210946 in words is "one hundred sixty-one million, two hundred ten thousand, nine hundred forty-six".