127578461 has 2 divisors, whose sum is σ = 127578462. Its totient is φ = 127578460.

The previous prime is 127578457. The next prime is 127578497. The reversal of 127578461 is 164875721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127554436 + 24025 = 11294^2 + 155^2 .

It is an emirp because it is prime and its reverse (164875721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127578461 - 2² = 127578457 is a prime.

It is a super-2 number, since 2×127578461² = 32552527422257042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127578431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63789230 + 63789231.

It is an arithmetic number, because the mean of its divisors is an integer number (63789231).

Almost surely, 2^127578461 is an apocalyptic number.

It is an amenable number.

127578461 is a deficient number, since it is larger than the sum of its proper divisors (1).

127578461 is an equidigital number, since it uses as much as digits as its factorization.

127578461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 41.

The square root of 127578461 is about 11295.0635677715. The cubic root of 127578461 is about 503.4145762558.

The spelling of 127578461 in words is "one hundred twenty-seven million, five hundred seventy-eight thousand, four hundred sixty-one".