1286520 has 64 divisors (see below), whose sum is σ = 3939840. Its totient is φ = 336000.

The previous prime is 1286513. The next prime is 1286521. The reversal of 1286520 is 256821.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8445 + ... + 8595.

It is an arithmetic number, because the mean of its divisors is an integer number (61560).

2^1286520 is an apocalyptic number.

1286520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1969920).

1286520 is an abundant number, since it is smaller than the sum of its proper divisors (2653320).

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

1286520 is a wasteful number, since it uses less digits than its factorization.

1286520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1286520 is about 1134.2486499882. The cubic root of 1286520 is about 108.7607467250.

The spelling of 1286520 in words is "one million, two hundred eighty-six thousand, five hundred twenty".