1223042402 has 4 divisors (see below), whose sum is σ = 1834563606. Its totient is φ = 611521200.

The previous prime is 1223042399. The next prime is 1223042449. The reversal of 1223042402 is 2042403221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 635997961 + 587044441 = 25219^2 + 24229^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305760599 + ... + 305760602.

Almost surely, 2^1223042402 is an apocalyptic number.

1223042402 is a deficient number, since it is larger than the sum of its proper divisors (611521204).

1223042402 is an equidigital number, since it uses as much as digits as its factorization.

1223042402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611521203.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1223042402 is about 34972.0231327843. The cubic root of 1223042402 is about 1069.4172160488.

Adding to 1223042402 its reverse (2042403221), we get a palindrome (3265445623).

The spelling of 1223042402 in words is "one billion, two hundred twenty-three million, forty-two thousand, four hundred two".