1428867 has 32 divisors (see below), whose sum is σ = 2453760. Its totient is φ = 812160.

The previous prime is 1428863. The next prime is 1428887. The reversal of 1428867 is 7688241.

It is not a de Polignac number, because 1428867 - 2² = 1428863 is a prime.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4908 + ... + 5190.

It is an arithmetic number, because the mean of its divisors is an integer number (76680).

2^1428867 is an apocalyptic number.

1428867 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1428867 is a deficient number, since it is larger than the sum of its proper divisors (1024893).

1428867 is a wasteful number, since it uses less digits than its factorization.

1428867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 314 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 1428867 is about 1195.3522493391. The cubic root of 1428867 is about 112.6325548649.

It can be divided in two parts, 142 and 8867, that added together give a palindrome (9009).

The spelling of 1428867 in words is "one million, four hundred twenty-eight thousand, eight hundred sixty-seven".