1222457 has 4 divisors (see below), whose sum is σ = 1228800. Its totient is φ = 1216116.

The previous prime is 1222433. The next prime is 1222471. The reversal of 1222457 is 7542221.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 1222457 - 2⁶ = 1222393 is a prime.

It is a super-2 number, since 2×1222457² = 2988802233698, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 2⁴ + 2⁶ + 2¹³ + 4² + 5⁸ + 7⁷ .

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1222057) 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 3 ways as a sum of consecutive naturals, for example, 2873 + ... + 3270.

It is an arithmetic number, because the mean of its divisors is an integer number (307200).

2^1222457 is an apocalyptic number.

It is an amenable number.

1222457 is a deficient number, since it is larger than the sum of its proper divisors (6343).

1222457 is an equidigital number, since it uses as much as digits as its factorization.

1222457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342.

The product of its digits is 1120, while the sum is 23.

The square root of 1222457 is about 1105.6477739316. The cubic root of 1222457 is about 106.9246565414.

Adding to 1222457 its reverse (7542221), we get a palindrome (8764678).

The spelling of 1222457 in words is "one million, two hundred twenty-two thousand, four hundred fifty-seven".