156601 has 2 divisors, whose sum is σ = 156602. Its totient is φ = 156600.

The previous prime is 156593. The next prime is 156619. The reversal of 156601 is 106651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156025 + 576 = 395^2 + 24^2 .

It is a cyclic number.

It is not a de Polignac number, because 156601 - 2³ = 156593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78300 + 78301.

It is an arithmetic number, because the mean of its divisors is an integer number (78301).

2¹⁵⁶⁶⁰¹ is an apocalyptic number.

It is an amenable number.

156601 is a deficient number, since it is larger than the sum of its proper divisors (1).

156601 is an equidigital number, since it uses as much as digits as its factorization.

156601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 156601 is about 395.7284422429. The cubic root of 156601 is about 53.9011681060.

It can be divided in two parts, 156 and 601, that added together give a palindrome (757).

The spelling of 156601 in words is "one hundred fifty-six thousand, six hundred one".