1428001 has 8 divisors (see below), whose sum is σ = 1522944. Its totient is φ = 1335840.

The previous prime is 1427999. The next prime is 1428013. The reversal of 1428001 is 1008241.

It is a happy number.

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

It is not a de Polignac number, because 1428001 - 2¹ = 1427999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421 + ... + 1741.

It is an arithmetic number, because the mean of its divisors is an integer number (190368).

2^1428001 is an apocalyptic number.

It is an amenable number.

1428001 is a deficient number, since it is larger than the sum of its proper divisors (94943).

1428001 is a wasteful number, since it uses less digits than its factorization.

1428001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1428001 is about 1194.9899581168. The cubic root of 1428001 is about 112.6097956894.

The spelling of 1428001 in words is "one million, four hundred twenty-eight thousand, one".