127561157 has 2 divisors, whose sum is σ = 127561158. Its totient is φ = 127561156.

The previous prime is 127561121. The next prime is 127561171. The reversal of 127561157 is 751165721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126922756 + 638401 = 11266^2 + 799^2 .

It is a cyclic number.

It is not a de Polignac number, because 127561157 - 2¹⁸ = 127299013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127561457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63780578 + 63780579.

It is an arithmetic number, because the mean of its divisors is an integer number (63780579).

Almost surely, 2^127561157 is an apocalyptic number.

It is an amenable number.

127561157 is a deficient number, since it is larger than the sum of its proper divisors (1).

127561157 is an equidigital number, since it uses as much as digits as its factorization.

127561157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 35.

The square root of 127561157 is about 11294.2975434509. The cubic root of 127561157 is about 503.3918151522.

The spelling of 127561157 in words is "one hundred twenty-seven million, five hundred sixty-one thousand, one hundred fifty-seven".