1213225402 has 8 divisors (see below), whose sum is σ = 1819986516. Its totient is φ = 606563232.

The previous prime is 1213225379. The next prime is 1213225427. The reversal of 1213225402 is 2045223121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1201384921 + 11840481 = 34661^2 + 3441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 31398 + ... + 58414.

Almost surely, 2^1213225402 is an apocalyptic number.

1213225402 is a deficient number, since it is larger than the sum of its proper divisors (606761114).

1213225402 is a wasteful number, since it uses less digits than its factorization.

1213225402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49472.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1213225402 is about 34831.3853011906. The cubic root of 1213225402 is about 1066.5482274527.

Adding to 1213225402 its reverse (2045223121), we get a palindrome (3258448523).

The spelling of 1213225402 in words is "one billion, two hundred thirteen million, two hundred twenty-five thousand, four hundred two".