1221452253 has 36 divisors (see below), whose sum is σ = 2068136928. Its totient is φ = 692611920.

The previous prime is 1221452233. The next prime is 1221452291. The reversal of 1221452253 is 3522541221.

1221452253 is a `hidden beast` number, since 122 + 14 + 522 + 5 + 3 = 666.

It is not a de Polignac number, because 1221452253 - 2¹⁰ = 1221451229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221452233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47200 + ... + 68342.

It is an arithmetic number, because the mean of its divisors is an integer number (57448248).

Almost surely, 2^1221452253 is an apocalyptic number.

It is an amenable number.

1221452253 is a deficient number, since it is larger than the sum of its proper divisors (846684675).

1221452253 is a wasteful number, since it uses less digits than its factorization.

1221452253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21294 (or 21284 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1221452253 is about 34949.2811514057. The cubic root of 1221452253 is about 1068.9535444066.

Adding to 1221452253 its reverse (3522541221), we get a palindrome (4743993474).

The spelling of 1221452253 in words is "one billion, two hundred twenty-one million, four hundred fifty-two thousand, two hundred fifty-three".