1224871956 has 240 divisors, whose sum is σ = 4132275840. Its totient is φ = 306996480.

The previous prime is 1224871951. The next prime is 1224871961. The reversal of 1224871956 is 6591784221.

It is an interprime number because it is at equal distance from previous prime (1224871951) and next prime (1224871961).

It is a super-2 number, since 2×1224871956² = 3000622617190531872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224871951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 722646 + ... + 724338.

It is an arithmetic number, because the mean of its divisors is an integer number (17217816).

Almost surely, 2^1224871956 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 1224871956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2066137920).

1224871956 is an abundant number, since it is smaller than the sum of its proper divisors (2907403884).

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

1224871956 is a wasteful number, since it uses less digits than its factorization.

1224871956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756 (or 1745 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1224871956 is about 34998.1707521979. The cubic root of 1224871956 is about 1069.9501988642.

It can be divided in two parts, 12248719 and 56, that added together give a triangular number (12248775 = T₄₉₄₉).

The spelling of 1224871956 in words is "one billion, two hundred twenty-four million, eight hundred seventy-one thousand, nine hundred fifty-six".