1212456 has 48 divisors (see below), whose sum is σ = 3529440. Its totient is φ = 346080.

The previous prime is 1212443. The next prime is 1212473. The reversal of 1212456 is 6542121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 661 + ... + 1691.

It is an arithmetic number, because the mean of its divisors is an integer number (73530).

2^1212456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1764720).

1212456 is an abundant number, since it is smaller than the sum of its proper divisors (2316984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212456 is a wasteful number, since it uses less digits than its factorization.

1212456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1043 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 1212456 is about 1101.1157977252. The cubic root of 1212456 is about 106.6322718967.

Adding to 1212456 its reverse (6542121), we get a palindrome (7754577).

The spelling of 1212456 in words is "one million, two hundred twelve thousand, four hundred fifty-six".