1022457 has 4 divisors (see below), whose sum is σ = 1363280. Its totient is φ = 681636.

The previous prime is 1022449. The next prime is 1022467. The reversal of 1022457 is 7542201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1022457 - 2³ = 1022449 is a prime.

It is a D-number.

It is a Duffinian number.

1022457 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1022467) 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, 170407 + ... + 170412.

It is an arithmetic number, because the mean of its divisors is an integer number (340820).

2^1022457 is an apocalyptic number.

It is an amenable number.

1022457 is a deficient number, since it is larger than the sum of its proper divisors (340823).

1022457 is an equidigital number, since it uses as much as digits as its factorization.

1022457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340822.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 1022457 is about 1011.1661584527. The cubic root of 1022457 is about 100.7430320266.

Adding to 1022457 its reverse (7542201), we get a palindrome (8564658).

The spelling of 1022457 in words is "one million, twenty-two thousand, four hundred fifty-seven".