1224500402 has 4 divisors (see below), whose sum is σ = 1836750606. Its totient is φ = 612250200.

The previous prime is 1224500399. The next prime is 1224500443. The reversal of 1224500402 is 2040054221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2040054221 = 227 ⋅8987023.

It can be written as a sum of positive squares in only one way, i.e., 1224370081 + 130321 = 34991^2 + 361^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306125099 + ... + 306125102.

Almost surely, 2^1224500402 is an apocalyptic number.

1224500402 is a deficient number, since it is larger than the sum of its proper divisors (612250204).

1224500402 is an equidigital number, since it uses as much as digits as its factorization.

1224500402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612250203.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1224500402 is about 34992.8621578744. The cubic root of 1224500402 is about 1069.8420013017.

Adding to 1224500402 its reverse (2040054221), we get a palindrome (3264554623).

The spelling of 1224500402 in words is "one billion, two hundred twenty-four million, five hundred thousand, four hundred two".