1224941985 has 24 divisors (see below), whose sum is σ = 2125077864. Its totient is φ = 652734720.

The previous prime is 1224941983. The next prime is 1224941999. The reversal of 1224941985 is 5891494221.

It is a happy number.

1224941985 is a `hidden beast` number, since 1 + 224 + 9 + 419 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 88510464 + 1136431521 = 9408^2 + 33711^2 .

It is not a de Polignac number, because 1224941985 - 2¹ = 1224941983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1224941985.

It is not an unprimeable number, because it can be changed into a prime (1224941983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43365 + ... + 65805.

It is an arithmetic number, because the mean of its divisors is an integer number (88544911).

Almost surely, 2^1224941985 is an apocalyptic number.

1224941985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224941985 is a deficient number, since it is larger than the sum of its proper divisors (900135879).

1224941985 is a wasteful number, since it uses less digits than its factorization.

1224941985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23665 (or 23662 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 1224941985 is about 34999.1712044728. The cubic root of 1224941985 is about 1069.9705890539.

The spelling of 1224941985 in words is "one billion, two hundred twenty-four million, nine hundred forty-one thousand, nine hundred eighty-five".