127752498421 has 2 divisors, whose sum is σ = 127752498422. Its totient is φ = 127752498420.

The previous prime is 127752498409. The next prime is 127752498427. The reversal of 127752498421 is 124894257721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115671411025 + 12081087396 = 340105^2 + 109914^2 .

It is a cyclic number.

It is not a de Polignac number, because 127752498421 - 2¹⁷ = 127752367349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127752498427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63876249210 + 63876249211.

It is an arithmetic number, because the mean of its divisors is an integer number (63876249211).

Almost surely, 2^127752498421 is an apocalyptic number.

It is an amenable number.

127752498421 is a deficient number, since it is larger than the sum of its proper divisors (1).

127752498421 is an equidigital number, since it uses as much as digits as its factorization.

127752498421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 52.

The spelling of 127752498421 in words is "one hundred twenty-seven billion, seven hundred fifty-two million, four hundred ninety-eight thousand, four hundred twenty-one".