127242473 has 2 divisors, whose sum is σ = 127242474. Its totient is φ = 127242472.

The previous prime is 127242421. The next prime is 127242491. The reversal of 127242473 is 374242721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114661264 + 12581209 = 10708^2 + 3547^2 .

It is an emirp because it is prime and its reverse (374242721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127242473 is a prime.

It is not a weakly prime, because it can be changed into another prime (127242673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63621236 + 63621237.

It is an arithmetic number, because the mean of its divisors is an integer number (63621237).

Almost surely, 2^127242473 is an apocalyptic number.

It is an amenable number.

127242473 is a deficient number, since it is larger than the sum of its proper divisors (1).

127242473 is an equidigital number, since it uses as much as digits as its factorization.

127242473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 32.

The square root of 127242473 is about 11280.1805393354. The cubic root of 127242473 is about 502.9722603265.

The spelling of 127242473 in words is "one hundred twenty-seven million, two hundred forty-two thousand, four hundred seventy-three".