156727121 has 2 divisors, whose sum is σ = 156727122. Its totient is φ = 156727120.

The previous prime is 156727091. The next prime is 156727141. The reversal of 156727121 is 121727651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124634896 + 32092225 = 11164^2 + 5665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156727121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156727141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78363560 + 78363561.

It is an arithmetic number, because the mean of its divisors is an integer number (78363561).

Almost surely, 2^156727121 is an apocalyptic number.

It is an amenable number.

156727121 is a deficient number, since it is larger than the sum of its proper divisors (1).

156727121 is an equidigital number, since it uses as much as digits as its factorization.

156727121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 32.

The square root of 156727121 is about 12519.0702929571. The cubic root of 156727121 is about 539.1563426531.

The spelling of 156727121 in words is "one hundred fifty-six million, seven hundred twenty-seven thousand, one hundred twenty-one".