156169 has 8 divisors (see below), whose sum is σ = 172872. Its totient is φ = 140160.

The previous prime is 156157. The next prime is 156217. The reversal of 156169 is 961651.

156169 = T₁₆ + T₁₇ + ... + T₉₇.

It can be written as a sum of positive squares in 4 ways, for example, as 5625 + 150544 = 75^2 + 388^2 .

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 156169 - 2⁷ = 156041 is a prime.

It is a super-2 number, since 2×156169² = 48777513122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156109) 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, 387 + ... + 679.

It is an arithmetic number, because the mean of its divisors is an integer number (21609).

2¹⁵⁶¹⁶⁹ is an apocalyptic number.

It is an amenable number.

156169 is a deficient number, since it is larger than the sum of its proper divisors (16703).

156169 is a wasteful number, since it uses less digits than its factorization.

156169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its digits is 1620, while the sum is 28.

The square root of 156169 is about 395.1822364429. The cubic root of 156169 is about 53.8515584842.

It can be divided in two parts, 15616 and 9, that added together give a 6-th power (15625 = 5⁶).

The spelling of 156169 in words is "one hundred fifty-six thousand, one hundred sixty-nine".