161042266 has 16 divisors (see below), whose sum is σ = 301170240. Its totient is φ = 62743680.

The previous prime is 161042261. The next prime is 161042281. The reversal of 161042266 is 662240161.

It is a super-2 number, since 2×161042266² = 51869222876829512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161042261) 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, 522711 + ... + 523018.

It is an arithmetic number, because the mean of its divisors is an integer number (18823140).

Almost surely, 2^161042266 is an apocalyptic number.

161042266 is a deficient number, since it is larger than the sum of its proper divisors (140127974).

161042266 is a wasteful number, since it uses less digits than its factorization.

161042266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045749.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 161042266 is about 12690.2429448770. The cubic root of 161042266 is about 544.0597833844.

The spelling of 161042266 in words is "one hundred sixty-one million, forty-two thousand, two hundred sixty-six".