1213235253 has 40 divisors (see below), whose sum is σ = 1934064000. Its totient is φ = 755687232.

The previous prime is 1213235227. The next prime is 1213235281. The reversal of 1213235253 is 3525323121.

It is a happy number.

1213235253 is a `hidden beast` number, since 1 + 2 + 132 + 3 + 525 + 3 = 666.

It is not a de Polignac number, because 1213235253 - 2¹⁷ = 1213104181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213235053) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 106948 + ... + 117746.

It is an arithmetic number, because the mean of its divisors is an integer number (48351600).

Almost surely, 2^1213235253 is an apocalyptic number.

It is an amenable number.

1213235253 is a deficient number, since it is larger than the sum of its proper divisors (720828747).

1213235253 is a wasteful number, since it uses less digits than its factorization.

1213235253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10903 (or 10894 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 1213235253 is about 34831.5267107257. The cubic root of 1213235253 is about 1066.5511141210.

Adding to 1213235253 its reverse (3525323121), we get a palindrome (4738558374).

The spelling of 1213235253 in words is "one billion, two hundred thirteen million, two hundred thirty-five thousand, two hundred fifty-three".