127901231 has 2 divisors, whose sum is σ = 127901232. Its totient is φ = 127901230.

The previous prime is 127901131. The next prime is 127901233. The reversal of 127901231 is 132109721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127901231 - 2¹⁴ = 127884847 is a prime.

It is a super-2 number, since 2×127901231² = 32717449782630722, which contains 22 as substring.

Together with 127901233, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127901231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127901233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63950615 + 63950616.

It is an arithmetic number, because the mean of its divisors is an integer number (63950616).

Almost surely, 2^127901231 is an apocalyptic number.

127901231 is a deficient number, since it is larger than the sum of its proper divisors (1).

127901231 is an equidigital number, since it uses as much as digits as its factorization.

127901231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 127901231 is about 11309.3426422582. The cubic root of 127901231 is about 503.8387604126.

The spelling of 127901231 in words is "one hundred twenty-seven million, nine hundred one thousand, two hundred thirty-one".