127494721 has 2 divisors, whose sum is σ = 127494722. Its totient is φ = 127494720.

The previous prime is 127494709. The next prime is 127494749.

127494721 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104837121 + 22657600 = 10239^2 + 4760^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 127494721 - 2¹⁵ = 127461953 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is equal to p_7243957 and since 127494721 and 7243957 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (127494821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63747360 + 63747361.

It is an arithmetic number, because the mean of its divisors is an integer number (63747361).

Almost surely, 2^127494721 is an apocalyptic number.

It is an amenable number.

127494721 is a deficient number, since it is larger than the sum of its proper divisors (1).

127494721 is an equidigital number, since it uses as much as digits as its factorization.

127494721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 127494721 is about 11291.3560301675. The cubic root of 127494721 is about 503.3044083296.

The spelling of 127494721 in words is "one hundred twenty-seven million, four hundred ninety-four thousand, seven hundred twenty-one".