1277988 has 24 divisors (see below), whose sum is σ = 3000480. Its totient is φ = 423360.

The previous prime is 1277971. The next prime is 1277993. The reversal of 1277988 is 8897721.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3183 + ... + 3561.

It is an arithmetic number, because the mean of its divisors is an integer number (125020).

2^1277988 is an apocalyptic number.

It is an amenable number.

1277988 is an abundant number, since it is smaller than the sum of its proper divisors (1722492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1277988 is a wasteful number, since it uses less digits than its factorization.

1277988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 665 counting only the distinct ones).

The product of its digits is 56448, while the sum is 42.

The square root of 1277988 is about 1130.4813134236. The cubic root of 1277988 is about 108.5197851607.

The spelling of 1277988 in words is "one million, two hundred seventy-seven thousand, nine hundred eighty-eight".