1428591 has 16 divisors (see below), whose sum is σ = 2039040. Its totient is φ = 887040.

The previous prime is 1428587. The next prime is 1428593. The reversal of 1428591 is 1958241.

It is a happy number.

It is not a de Polignac number, because 1428591 - 2² = 1428587 is a prime.

1428591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3871 + ... + 4223.

It is an arithmetic number, because the mean of its divisors is an integer number (127440).

2^1428591 is an apocalyptic number.

1428591 is a deficient number, since it is larger than the sum of its proper divisors (610449).

1428591 is a wasteful number, since it uses less digits than its factorization.

1428591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its digits is 2880, while the sum is 30.

The square root of 1428591 is about 1195.2367966223. The cubic root of 1428591 is about 112.6253023619.

The spelling of 1428591 in words is "one million, four hundred twenty-eight thousand, five hundred ninety-one".