1312428 has 48 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 393024.

The previous prime is 1312411. The next prime is 1312459. The reversal of 1312428 is 8242131.

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, 7243 + ... + 7421.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2^1312428 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 1312428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693440).

1312428 is an abundant number, since it is smaller than the sum of its proper divisors (2074452).

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

1312428 is a wasteful number, since it uses less digits than its factorization.

1312428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 244 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 1312428 is about 1145.6124999318. The cubic root of 1312428 is about 109.4859763947.

Adding to 1312428 its reverse (8242131), we get a palindrome (9554559).

The spelling of 1312428 in words is "one million, three hundred twelve thousand, four hundred twenty-eight".