1428577 has 4 divisors (see below), whose sum is σ = 1431556. Its totient is φ = 1425600.

The previous prime is 1428571. The next prime is 1428587. The reversal of 1428577 is 7758241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 904401 + 524176 = 951^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428577 - 2¹⁵ = 1395809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588 + ... + 1789.

It is an arithmetic number, because the mean of its divisors is an integer number (357889).

2^1428577 is an apocalyptic number.

It is an amenable number.

1428577 is a deficient number, since it is larger than the sum of its proper divisors (2979).

1428577 is an equidigital number, since it uses as much as digits as its factorization.

1428577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978.

The product of its digits is 15680, while the sum is 34.

The square root of 1428577 is about 1195.2309400279. The cubic root of 1428577 is about 112.6249344564.

It can be divided in two parts, 142857 and 7, that multiplied together give a palindrome (999999).

The spelling of 1428577 in words is "one million, four hundred twenty-eight thousand, five hundred seventy-seven".