1428165 has 32 divisors (see below), whose sum is σ = 2592000. Its totient is φ = 745920.

The previous prime is 1428157. The next prime is 1428169. The reversal of 1428165 is 5618241.

It is not a de Polignac number, because 1428165 - 2³ = 1428157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428169) 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, 9511 + ... + 9659.

It is an arithmetic number, because the mean of its divisors is an integer number (81000).

2^1428165 is an apocalyptic number.

1428165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1428165 is a deficient number, since it is larger than the sum of its proper divisors (1163835).

1428165 is a wasteful number, since it uses less digits than its factorization.

1428165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 228 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1428165 is about 1195.0585759702. The cubic root of 1428165 is about 112.6141064473.

The spelling of 1428165 in words is "one million, four hundred twenty-eight thousand, one hundred sixty-five".