1286964 has 36 divisors (see below), whose sum is σ = 3718624. Its totient is φ = 367632.

The previous prime is 1286959. The next prime is 1286969. The reversal of 1286964 is 4696821.

It is an interprime number because it is at equal distance from previous prime (1286959) and next prime (1286969).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286969) 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, 2302 + ... + 2805.

2^1286964 is an apocalyptic number.

1286964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1286964 is an abundant number, since it is smaller than the sum of its proper divisors (2431660).

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

1286964 is a wasteful number, since it uses less digits than its factorization.

1286964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124 (or 5119 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1286964 is about 1134.4443573838. Note that the first 3 decimals coincide. The cubic root of 1286964 is about 108.7732570157.

The spelling of 1286964 in words is "one million, two hundred eighty-six thousand, nine hundred sixty-four".