127145731 has 2 divisors, whose sum is σ = 127145732. Its totient is φ = 127145730.

The previous prime is 127145729. The next prime is 127145749. The reversal of 127145731 is 137541721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 127145731 - 2¹ = 127145729 is a prime.

It is a super-2 number, since 2×127145731² = 32332073823048722, which contains 22 as substring.

Together with 127145729, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 127145693 and 127145702.

It is not a weakly prime, because it can be changed into another prime (127145761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63572865 + 63572866.

It is an arithmetic number, because the mean of its divisors is an integer number (63572866).

Almost surely, 2^127145731 is an apocalyptic number.

127145731 is the 7132-nd centered pentagonal number.

127145731 is a deficient number, since it is larger than the sum of its proper divisors (1).

127145731 is an equidigital number, since it uses as much as digits as its factorization.

127145731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 31.

The square root of 127145731 is about 11275.8915833738. The cubic root of 127145731 is about 502.8447586674.

The spelling of 127145731 in words is "one hundred twenty-seven million, one hundred forty-five thousand, seven hundred thirty-one".