1287832 has 64 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 483840.

The previous prime is 1287829. The next prime is 1287841. The reversal of 1287832 is 2387821.

It is a super-2 number, since 2×1287832² = 3317022520448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (5376) is a multiple of the sum of its prime divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 1287794 and 1287803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21082 + ... + 21142.

It is an arithmetic number, because the mean of its divisors is an integer number (48825).

2^1287832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1287832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562400).

1287832 is an abundant number, since it is smaller than the sum of its proper divisors (1836968).

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

1287832 is a wasteful number, since it uses less digits than its factorization.

1287832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 112 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 1287832 is about 1134.8268590406. The cubic root of 1287832 is about 108.7977057619.

The spelling of 1287832 in words is "one million, two hundred eighty-seven thousand, eight hundred thirty-two".