157861241 has 2 divisors, whose sum is σ = 157861242. Its totient is φ = 157861240.

The previous prime is 157861217. The next prime is 157861267. The reversal of 157861241 is 142168751.

157861241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83539600 + 74321641 = 9140^2 + 8621^2 .

It is an emirp because it is prime and its reverse (142168751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157861241 - 2¹⁸ = 157599097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157861211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78930620 + 78930621.

It is an arithmetic number, because the mean of its divisors is an integer number (78930621).

Almost surely, 2^157861241 is an apocalyptic number.

It is an amenable number.

157861241 is a deficient number, since it is larger than the sum of its proper divisors (1).

157861241 is an equidigital number, since it uses as much as digits as its factorization.

157861241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 157861241 is about 12564.2843409404. The cubic root of 157861241 is about 540.4537121878.

The spelling of 157861241 in words is "one hundred fifty-seven million, eight hundred sixty-one thousand, two hundred forty-one".