1028457 has 10 divisors (see below), whose sum is σ = 1536458. Its totient is φ = 685584.

The previous prime is 1028437. The next prime is 1028471. The reversal of 1028457 is 7548201.

It can be written as a sum of positive squares in only one way, i.e., 746496 + 281961 = 864^2 + 531^2 .

It is not a de Polignac number, because 1028457 - 2⁶ = 1028393 is a prime.

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

It is a Duffinian number.

1028457 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028457.

It is not an unprimeable number, because it can be changed into a prime (1028437) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6268 + ... + 6429.

2^1028457 is an apocalyptic number.

It is an amenable number.

1028457 is a deficient number, since it is larger than the sum of its proper divisors (508001).

1028457 is an equidigital number, since it uses as much as digits as its factorization.

1028457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12709 (or 12700 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1028457 is about 1014.1286900586. The cubic root of 1028457 is about 100.9397084859.

It can be divided in two parts, 1028 and 457, that added together give a triangular number (1485 = T₅₄).

The spelling of 1028457 in words is "one million, twenty-eight thousand, four hundred fifty-seven".