1428621 has 8 divisors (see below), whose sum is σ = 1915200. Its totient is φ = 947232.

The previous prime is 1428613. The next prime is 1428631. The reversal of 1428621 is 1268241.

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

It is not a de Polignac number, because 1428621 - 2³ = 1428613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1428591 and 1428600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428601) 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, 600 + ... + 1793.

It is an arithmetic number, because the mean of its divisors is an integer number (239400).

2^1428621 is an apocalyptic number.

It is an amenable number.

1428621 is a deficient number, since it is larger than the sum of its proper divisors (486579).

1428621 is a wasteful number, since it uses less digits than its factorization.

1428621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595.

The product of its digits is 768, while the sum is 24.

The square root of 1428621 is about 1195.2493463709. The cubic root of 1428621 is about 112.6260907227.

The spelling of 1428621 in words is "one million, four hundred twenty-eight thousand, six hundred twenty-one".