1222456 has 16 divisors (see below), whose sum is σ = 2348640. Its totient is φ = 596160.

The previous prime is 1222433. The next prime is 1222471. The reversal of 1222456 is 6542221.

It is an Ulam number.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536 + ... + 2191.

It is an arithmetic number, because the mean of its divisors is an integer number (146790).

2^1222456 is an apocalyptic number.

It is an amenable number.

1222456 is a deficient number, since it is larger than the sum of its proper divisors (1126184).

1222456 is a wasteful number, since it uses less digits than its factorization.

1222456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774 (or 3770 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 1222456 is about 1105.6473217080. The cubic root of 1222456 is about 106.9246273857.

Adding to 1222456 its reverse (6542221), we get a palindrome (7764677).

The spelling of 1222456 in words is "one million, two hundred twenty-two thousand, four hundred fifty-six".