161279 has 8 divisors (see below), whose sum is σ = 174960. Its totient is φ = 148096.

The previous prime is 161267. The next prime is 161281. The reversal of 161279 is 972161.

161279 = T₅₀ + T₅₁ + ... + T₁₀₂.

161279 = 27² + 28² + ... + 79².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161279 - 2⁴ = 161263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161779) 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, 812 + ... + 990.

It is an arithmetic number, because the mean of its divisors is an integer number (21870).

2¹⁶¹²⁷⁹ is an apocalyptic number.

161279 is a deficient number, since it is larger than the sum of its proper divisors (13681).

161279 is a wasteful number, since it uses less digits than its factorization.

161279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249.

The product of its digits is 756, while the sum is 26.

The square root of 161279 is about 401.5955677046. The cubic root of 161279 is about 54.4326244259.

The spelling of 161279 in words is "one hundred sixty-one thousand, two hundred seventy-nine".