127225517 has 2 divisors, whose sum is σ = 127225518. Its totient is φ = 127225516.

The previous prime is 127225481. The next prime is 127225531. The reversal of 127225517 is 715522721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125865961 + 1359556 = 11219^2 + 1166^2 .

It is an emirp because it is prime and its reverse (715522721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127225517 - 2¹⁸ = 126963373 is a prime.

It is equal to p_7229552 and since 127225517 and 7229552 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127225547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63612758 + 63612759.

It is an arithmetic number, because the mean of its divisors is an integer number (63612759).

Almost surely, 2^127225517 is an apocalyptic number.

It is an amenable number.

127225517 is a deficient number, since it is larger than the sum of its proper divisors (1).

127225517 is an equidigital number, since it uses as much as digits as its factorization.

127225517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9800, while the sum is 32.

The square root of 127225517 is about 11279.4289305798. The cubic root of 127225517 is about 502.9499177436.

The spelling of 127225517 in words is "one hundred twenty-seven million, two hundred twenty-five thousand, five hundred seventeen".