1428531 has 8 divisors (see below), whose sum is σ = 2051280. Its totient is φ = 879072.

The previous prime is 1428529. The next prime is 1428541. The reversal of 1428531 is 1358241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1428531 - 2¹ = 1428529 is a prime.

It is a super-2 number, since 2×1428531² = 4081401635922, which contains 22 as substring.

1428531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1428521) by changing a digit.

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, 18276 + ... + 18353.

It is an arithmetic number, because the mean of its divisors is an integer number (256410).

2^1428531 is an apocalyptic number.

1428531 is a deficient number, since it is larger than the sum of its proper divisors (622749).

1428531 is a wasteful number, since it uses less digits than its factorization.

1428531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36645.

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

The square root of 1428531 is about 1195.2116967299. The cubic root of 1428531 is about 112.6237256072.

The spelling of 1428531 in words is "one million, four hundred twenty-eight thousand, five hundred thirty-one".