156378241 has 2 divisors, whose sum is σ = 156378242. Its totient is φ = 156378240.

The previous prime is 156378221. The next prime is 156378247. The reversal of 156378241 is 142873651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134560000 + 21818241 = 11600^2 + 4671^2 .

It is a cyclic number.

It is not a de Polignac number, because 156378241 - 2⁹ = 156377729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 156378241.

It is not a weakly prime, because it can be changed into another prime (156378247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78189120 + 78189121.

It is an arithmetic number, because the mean of its divisors is an integer number (78189121).

Almost surely, 2^156378241 is an apocalyptic number.

It is an amenable number.

156378241 is a deficient number, since it is larger than the sum of its proper divisors (1).

156378241 is an equidigital number, since it uses as much as digits as its factorization.

156378241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 156378241 is about 12505.1285879034. The cubic root of 156378241 is about 538.7559852049.

The spelling of 156378241 in words is "one hundred fifty-six million, three hundred seventy-eight thousand, two hundred forty-one".