1286140 has 24 divisors (see below), whose sum is σ = 2730672. Its totient is φ = 508800.

The previous prime is 1286119. The next prime is 1286147. The reversal of 1286140 is 416821.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286147) 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, 1840 + ... + 2440.

It is an arithmetic number, because the mean of its divisors is an integer number (113778).

2^1286140 is an apocalyptic number.

1286140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1286140 is an abundant number, since it is smaller than the sum of its proper divisors (1444532).

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

1286140 is a wasteful number, since it uses less digits than its factorization.

1286140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1286140 is about 1134.0811258459. The cubic root of 1286140 is about 108.7500374334.

The spelling of 1286140 in words is "one million, two hundred eighty-six thousand, one hundred forty".