156842641 has 2 divisors, whose sum is σ = 156842642. Its totient is φ = 156842640.

The previous prime is 156842627. The next prime is 156842657. The reversal of 156842641 is 146248651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135024400 + 21818241 = 11620^2 + 4671^2 .

It is a cyclic number.

It is not a de Polignac number, because 156842641 - 2⁷ = 156842513 is a prime.

It is a super-2 number, since 2×156842641² = 49199228071709762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 156842641.

It is not a weakly prime, because it can be changed into another prime (156840641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78421320 + 78421321.

It is an arithmetic number, because the mean of its divisors is an integer number (78421321).

Almost surely, 2^156842641 is an apocalyptic number.

It is an amenable number.

156842641 is a deficient number, since it is larger than the sum of its proper divisors (1).

156842641 is an equidigital number, since it uses as much as digits as its factorization.

156842641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 156842641 is about 12523.6832042335. The cubic root of 156842641 is about 539.2887767505.

The spelling of 156842641 in words is "one hundred fifty-six million, eight hundred forty-two thousand, six hundred forty-one".