1224021402 has 64 divisors (see below), whose sum is σ = 2802539520. Its totient is φ = 395766000.

The previous prime is 1224021397. The next prime is 1224021413. The reversal of 1224021402 is 2041204221.

1224021402 is a `hidden beast` number, since 1 + 2 + 240 + 21 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348877 + ... + 352367.

It is an arithmetic number, because the mean of its divisors is an integer number (43789680).

Almost surely, 2^1224021402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224021402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401269760).

1224021402 is an abundant number, since it is smaller than the sum of its proper divisors (1578518118).

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

1224021402 is a wasteful number, since it uses less digits than its factorization.

1224021402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696 (or 3690 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1224021402 is about 34986.0172354614. The cubic root of 1224021402 is about 1069.7024828627.

Adding to 1224021402 its reverse (2041204221), we get a palindrome (3265225623).

The spelling of 1224021402 in words is "one billion, two hundred twenty-four million, twenty-one thousand, four hundred two".