1277881 has 12 divisors (see below), whose sum is σ = 1436400. Its totient is φ = 1135640.

The previous prime is 1277879. The next prime is 1277897. The reversal of 1277881 is 1887721.

It is not a de Polignac number, because 1277881 - 2¹ = 1277879 is a prime.

It is a super-2 number, since 2×1277881² = 3265959700322, which contains 22 as substring.

It is a Duffinian number.

1277881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1272881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7050 + ... + 7228.

It is an arithmetic number, because the mean of its divisors is an integer number (119700).

2^1277881 is an apocalyptic number.

1277881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1277881 is a deficient number, since it is larger than the sum of its proper divisors (158519).

1277881 is a wasteful number, since it uses less digits than its factorization.

1277881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 249 counting only the distinct ones).

The product of its digits is 6272, while the sum is 34.

The square root of 1277881 is about 1130.4339874579. The cubic root of 1277881 is about 108.5167564570.

It can be divided in two parts, 127 and 7881, that added together give a palindrome (8008).

The spelling of 1277881 in words is "one million, two hundred seventy-seven thousand, eight hundred eighty-one".