161211074 has 4 divisors (see below), whose sum is σ = 241816614. Its totient is φ = 80605536.

The previous prime is 161211053. The next prime is 161211077. The reversal of 161211074 is 470112161.

It is a happy number.

161211074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 137053849 + 24157225 = 11707^2 + 4915^2 .

It is not an unprimeable number, because it can be changed into a prime (161211077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40302767 + ... + 40302770.

Almost surely, 2^161211074 is an apocalyptic number.

161211074 is a deficient number, since it is larger than the sum of its proper divisors (80605540).

161211074 is an equidigital number, since it uses as much as digits as its factorization.

161211074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80605539.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 161211074 is about 12696.8922969363. The cubic root of 161211074 is about 544.2498154274.

The spelling of 161211074 in words is "one hundred sixty-one million, two hundred eleven thousand, seventy-four".