1224699705 has 12 divisors (see below), whose sum is σ = 2122812900. Its totient is φ = 653173152.

The previous prime is 1224699691. The next prime is 1224699713. The reversal of 1224699705 is 5079964221.

It can be written as a sum of positive squares in 2 ways, for example, as 738100224 + 486599481 = 27168^2 + 22059^2 .

It is not a de Polignac number, because 1224699705 - 2¹² = 1224695609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 27215549 = 1224699705 / (1 + 2 + 2 + 4 + 6 + 9 + 9 + 7 + 0 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13607730 + ... + 13607819.

It is an arithmetic number, because the mean of its divisors is an integer number (176901075).

Almost surely, 2^1224699705 is an apocalyptic number.

1224699705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224699705 is a deficient number, since it is larger than the sum of its proper divisors (898113195).

1224699705 is a wasteful number, since it uses less digits than its factorization.

1224699705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27215560 (or 27215557 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1224699705 is about 34995.7098084894. The cubic root of 1224699705 is about 1069.9000416129.

The spelling of 1224699705 in words is "one billion, two hundred twenty-four million, six hundred ninety-nine thousand, seven hundred five".