127192561 has 2 divisors, whose sum is σ = 127192562. Its totient is φ = 127192560.

The previous prime is 127192547. The next prime is 127192573. The reversal of 127192561 is 165291721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123654400 + 3538161 = 11120^2 + 1881^2 .

It is a cyclic number.

It is not a de Polignac number, because 127192561 - 2⁵ = 127192529 is a prime.

It is not a weakly prime, because it can be changed into another prime (127192531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63596280 + 63596281.

It is an arithmetic number, because the mean of its divisors is an integer number (63596281).

Almost surely, 2^127192561 is an apocalyptic number.

It is an amenable number.

127192561 is a deficient number, since it is larger than the sum of its proper divisors (1).

127192561 is an equidigital number, since it uses as much as digits as its factorization.

127192561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 34.

The square root of 127192561 is about 11277.9679463989. The cubic root of 127192561 is about 502.9064866006.

The spelling of 127192561 in words is "one hundred twenty-seven million, one hundred ninety-two thousand, five hundred sixty-one".