1224745861 has 16 divisors (see below), whose sum is σ = 1297202688. Its totient is φ = 1154721600.

The previous prime is 1224745859. The next prime is 1224745877. The reversal of 1224745861 is 1685474221.

It is a cyclic number.

It is not a de Polignac number, because 1224745861 - 2¹ = 1224745859 is a prime.

It is a super-3 number, since 3×1224745861³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224745801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199311 + ... + 205363.

It is an arithmetic number, because the mean of its divisors is an integer number (81075168).

Almost surely, 2^1224745861 is an apocalyptic number.

It is an amenable number.

1224745861 is a deficient number, since it is larger than the sum of its proper divisors (72456827).

1224745861 is a wasteful number, since it uses less digits than its factorization.

1224745861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6252.

The product of its digits is 107520, while the sum is 40.

The square root of 1224745861 is about 34996.3692545384. The cubic root of 1224745861 is about 1069.9134821011.

The spelling of 1224745861 in words is "one billion, two hundred twenty-four million, seven hundred forty-five thousand, eight hundred sixty-one".