1212423653 has 8 divisors (see below), whose sum is σ = 1389286080. Its totient is φ = 1036476000.

The previous prime is 1212423637. The next prime is 1212423673. The reversal of 1212423653 is 3563242121.

It is a happy number.

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

It is not a de Polignac number, because 1212423653 - 2⁴ = 1212423637 is a prime.

It is a super-2 number, since 2×1212423653² = 2939942228707728818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212423673) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 225848 + ... + 231153.

It is an arithmetic number, because the mean of its divisors is an integer number (173660760).

Almost surely, 2^1212423653 is an apocalyptic number.

It is an amenable number.

1212423653 is a deficient number, since it is larger than the sum of its proper divisors (176862427).

1212423653 is an equidigital number, since it uses as much as digits as its factorization.

1212423653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457387.

The product of its digits is 8640, while the sum is 29.

The square root of 1212423653 is about 34819.8743966718. The cubic root of 1212423653 is about 1066.3132361078.

Adding to 1212423653 its reverse (3563242121), we get a palindrome (4775665774).

The spelling of 1212423653 in words is "one billion, two hundred twelve million, four hundred twenty-three thousand, six hundred fifty-three".