1277404031 has 2 divisors, whose sum is σ = 1277404032. Its totient is φ = 1277404030.

The previous prime is 1277404003. The next prime is 1277404057. The reversal of 1277404031 is 1304047721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277404031 is a prime.

It is a super-2 number, since 2×1277404031² = 3263522116830097922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1277403985 and 1277404003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277404001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638702015 + 638702016.

It is an arithmetic number, because the mean of its divisors is an integer number (638702016).

Almost surely, 2^1277404031 is an apocalyptic number.

1277404031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277404031 is an equidigital number, since it uses as much as digits as its factorization.

1277404031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 1277404031 is about 35740.7894568657. The cubic root of 1277404031 is about 1085.0325348608.

The spelling of 1277404031 in words is "one billion, two hundred seventy-seven million, four hundred four thousand, thirty-one".