127145813 has 2 divisors, whose sum is σ = 127145814. Its totient is φ = 127145812.

The previous prime is 127145761. The next prime is 127145827. The reversal of 127145813 is 318541721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114019684 + 13126129 = 10678^2 + 3623^2 .

It is a cyclic number.

It is not a de Polignac number, because 127145813 - 2⁶ = 127145749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127145813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127145713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63572906 + 63572907.

It is an arithmetic number, because the mean of its divisors is an integer number (63572907).

Almost surely, 2^127145813 is an apocalyptic number.

It is an amenable number.

127145813 is a deficient number, since it is larger than the sum of its proper divisors (1).

127145813 is an equidigital number, since it uses as much as digits as its factorization.

127145813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 32.

The square root of 127145813 is about 11275.8952194493. The cubic root of 127145813 is about 502.8448667671.

The spelling of 127145813 in words is "one hundred twenty-seven million, one hundred forty-five thousand, eight hundred thirteen".