1277404057 has 2 divisors, whose sum is σ = 1277404058. Its totient is φ = 1277404056.

The previous prime is 1277404031. The next prime is 1277404069. The reversal of 1277404057 is 7504047721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 882030601 + 395373456 = 29699^2 + 19884^2 .

It is an emirp because it is prime and its reverse (7504047721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277404057 is a prime.

It is a super-2 number, since 2×1277404057² = 3263522249680118498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1277404087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638702028 + 638702029.

It is an arithmetic number, because the mean of its divisors is an integer number (638702029).

Almost surely, 2^1277404057 is an apocalyptic number.

It is an amenable number.

1277404057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277404057 is an equidigital number, since it uses as much as digits as its factorization.

1277404057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54880, while the sum is 37.

The square root of 1277404057 is about 35740.7898205957. The cubic root of 1277404057 is about 1085.0325422223.

The spelling of 1277404057 in words is "one billion, two hundred seventy-seven million, four hundred four thousand, fifty-seven".