1277385056 has 24 divisors (see below), whose sum is σ = 2528757504. Its totient is φ = 635160960.

The previous prime is 1277385041. The next prime is 1277385089. The reversal of 1277385056 is 6505837721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1277384998 and 1277385016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104480 + ... + 116063.

It is an arithmetic number, because the mean of its divisors is an integer number (105364896).

Almost surely, 2^1277385056 is an apocalyptic number.

1277385056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1277385056 is a deficient number, since it is larger than the sum of its proper divisors (1251372448).

1277385056 is a wasteful number, since it uses less digits than its factorization.

1277385056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220734 (or 220726 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 1277385056 is about 35740.5240028738. The cubic root of 1277385056 is about 1085.0271623517.

The spelling of 1277385056 in words is "one billion, two hundred seventy-seven million, three hundred eighty-five thousand, fifty-six".