156841 has 2 divisors, whose sum is σ = 156842. Its totient is φ = 156840.

The previous prime is 156833. The next prime is 156887. The reversal of 156841 is 148651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156816 + 25 = 396^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 156841 - 2³ = 156833 is a prime.

156841 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (156041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78420 + 78421.

It is an arithmetic number, because the mean of its divisors is an integer number (78421).

2¹⁵⁶⁸⁴¹ is an apocalyptic number.

It is an amenable number.

156841 is a deficient number, since it is larger than the sum of its proper divisors (1).

156841 is an equidigital number, since it uses as much as digits as its factorization.

156841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 25.

The square root of 156841 is about 396.0315643986. The cubic root of 156841 is about 53.9286895936.

Subtracting from 156841 its sum of digits (25), we obtain a square (156816 = 396²).

The spelling of 156841 in words is "one hundred fifty-six thousand, eight hundred forty-one".