1531428 has 24 divisors (see below), whose sum is σ = 3784032. Its totient is φ = 480384.

The previous prime is 1531379. The next prime is 1531447. The reversal of 1531428 is 8241351.

It is a junction number, because it is equal to n+sod(n) for n = 1531398 and 1531407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3550 + ... + 3957.

It is an arithmetic number, because the mean of its divisors is an integer number (157668).

2^1531428 is an apocalyptic number.

It is an amenable number.

1531428 is an abundant number, since it is smaller than the sum of its proper divisors (2252604).

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

1531428 is a wasteful number, since it uses less digits than its factorization.

1531428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7531 (or 7529 counting only the distinct ones).

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

The square root of 1531428 is about 1237.5087878476. The cubic root of 1531428 is about 115.2653732926.

Adding to 1531428 its reverse (8241351), we get a palindrome (9772779).

The spelling of 1531428 in words is "one million, five hundred thirty-one thousand, four hundred twenty-eight".