1213045253 has 8 divisors (see below), whose sum is σ = 1459302720. Its totient is φ = 985029120.

The previous prime is 1213045243. The next prime is 1213045313. The reversal of 1213045253 is 3525403121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1213045253 - 2⁸ = 1213044997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213045243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4560188 + ... + 4560453.

It is an arithmetic number, because the mean of its divisors is an integer number (182412840).

Almost surely, 2^1213045253 is an apocalyptic number.

It is an amenable number.

1213045253 is a deficient number, since it is larger than the sum of its proper divisors (246257467).

1213045253 is an equidigital number, since it uses as much as digits as its factorization.

1213045253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9120667.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1213045253 is about 34828.7991897510. The cubic root of 1213045253 is about 1066.4954350897.

Adding to 1213045253 its reverse (3525403121), we get a palindrome (4738448374).

The spelling of 1213045253 in words is "one billion, two hundred thirteen million, forty-five thousand, two hundred fifty-three".