1286988 has 24 divisors (see below), whose sum is σ = 3134208. Its totient is φ = 410256.

The previous prime is 1286983. The next prime is 1287007. The reversal of 1286988 is 8896821.

It is a super-2 number, since 2×1286988² = 3312676224288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1286981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2056 + ... + 2607.

It is an arithmetic number, because the mean of its divisors is an integer number (130592).

2^1286988 is an apocalyptic number.

It is an amenable number.

1286988 is an abundant number, since it is smaller than the sum of its proper divisors (1847220).

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

1286988 is a wasteful number, since it uses less digits than its factorization.

1286988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693 (or 4691 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 1286988 is about 1134.4549352002. The cubic root of 1286988 is about 108.7739331656.

The spelling of 1286988 in words is "one million, two hundred eighty-six thousand, nine hundred eighty-eight".