1213402245 has 16 divisors (see below), whose sum is σ = 2117938752. Its totient is φ = 588316160.

The previous prime is 1213402199. The next prime is 1213402247. The reversal of 1213402245 is 5422043121.

It is not a de Polignac number, because 1213402245 - 2⁸ = 1213401989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213402247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3676812 + ... + 3677141.

It is an arithmetic number, because the mean of its divisors is an integer number (132371172).

Almost surely, 2^1213402245 is an apocalyptic number.

1213402245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213402245 is a deficient number, since it is larger than the sum of its proper divisors (904536507).

1213402245 is a wasteful number, since it uses less digits than its factorization.

1213402245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7353972.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1213402245 is about 34833.9237669258. The cubic root of 1213402245 is about 1066.6000459151.

Adding to 1213402245 its reverse (5422043121), we get a palindrome (6635445366).

The spelling of 1213402245 in words is "one billion, two hundred thirteen million, four hundred two thousand, two hundred forty-five".