1224156 has 12 divisors (see below), whose sum is σ = 2856392. Its totient is φ = 408048.

The previous prime is 1224149. The next prime is 1224163. The reversal of 1224156 is 6514221.

It is an interprime number because it is at equal distance from previous prime (1224149) and next prime (1224163).

It is a tau number, because it is divible by the number of its divisors (12).

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, 50995 + ... + 51018.

2^1224156 is an apocalyptic number.

It is an amenable number.

1224156 is an abundant number, since it is smaller than the sum of its proper divisors (1632236).

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

1224156 is a wasteful number, since it uses less digits than its factorization.

1224156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102020 (or 102018 counting only the distinct ones).

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

The square root of 1224156 is about 1106.4158350277. The cubic root of 1224156 is about 106.9741690929.

Adding to 1224156 its reverse (6514221), we get a palindrome (7738377).

It can be divided in two parts, 122 and 4156, that added together give a triangular number (4278 = T₉₂).

The spelling of 1224156 in words is "one million, two hundred twenty-four thousand, one hundred fifty-six".