157765241 has 2 divisors, whose sum is σ = 157765242. Its totient is φ = 157765240.

The previous prime is 157765217. The next prime is 157765247. The reversal of 157765241 is 142567751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126450025 + 31315216 = 11245^2 + 5596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157765241 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 157765195 and 157765204.

It is not a weakly prime, because it can be changed into another prime (157765247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78882620 + 78882621.

It is an arithmetic number, because the mean of its divisors is an integer number (78882621).

Almost surely, 2^157765241 is an apocalyptic number.

It is an amenable number.

157765241 is a deficient number, since it is larger than the sum of its proper divisors (1).

157765241 is an equidigital number, since it uses as much as digits as its factorization.

157765241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 38.

The square root of 157765241 is about 12560.4634070563. The cubic root of 157765241 is about 540.3441347790.

The spelling of 157765241 in words is "one hundred fifty-seven million, seven hundred sixty-five thousand, two hundred forty-one".