1222455 has 16 divisors (see below), whose sum is σ = 2106720. Its totient is φ = 601728.

The previous prime is 1222433. The next prime is 1222471. The reversal of 1222455 is 5542221.

It is a happy number.

It is not a de Polignac number, because 1222455 - 2¹⁴ = 1206071 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 2940 + ... + 3329.

It is an arithmetic number, because the mean of its divisors is an integer number (131670).

2^1222455 is an apocalyptic number.

1222455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1222455 is a deficient number, since it is larger than the sum of its proper divisors (884265).

1222455 is a wasteful number, since it uses less digits than its factorization.

1222455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6290.

The product of its digits is 800, while the sum is 21.

The square root of 1222455 is about 1105.6468694841. The cubic root of 1222455 is about 106.9245982300.

Adding to 1222455 its reverse (5542221), we get a palindrome (6764676).

The spelling of 1222455 in words is "one million, two hundred twenty-two thousand, four hundred fifty-five".