1428861 has 8 divisors (see below), whose sum is σ = 2177344. Its totient is φ = 816480.

The previous prime is 1428853. The next prime is 1428863. The reversal of 1428861 is 1688241.

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

It is not a de Polignac number, because 1428861 - 2³ = 1428853 is a prime.

It is a Duffinian number.

1428861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428863) 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, 34000 + ... + 34041.

It is an arithmetic number, because the mean of its divisors is an integer number (272168).

2^1428861 is an apocalyptic number.

It is an amenable number.

1428861 is a deficient number, since it is larger than the sum of its proper divisors (748483).

1428861 is an equidigital number, since it uses as much as digits as its factorization.

1428861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68051.

The product of its digits is 3072, while the sum is 30.

The square root of 1428861 is about 1195.3497396160. The cubic root of 1428861 is about 112.6323972118.

The spelling of 1428861 in words is "one million, four hundred twenty-eight thousand, eight hundred sixty-one".