1243553212 has 24 divisors (see below), whose sum is σ = 2400738480. Its totient is φ = 558898560.

The previous prime is 1243553209. The next prime is 1243553221. The reversal of 1243553212 is 2123553421.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 154863 + ... + 162694.

It is an arithmetic number, because the mean of its divisors is an integer number (100030770).

Almost surely, 2^1243553212 is an apocalyptic number.

It is an amenable number.

1243553212 is a deficient number, since it is larger than the sum of its proper divisors (1157185268).

1243553212 is a wasteful number, since it uses less digits than its factorization.

1243553212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317661 (or 317659 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 1243553212 is about 35264.0498525056. The cubic root of 1243553212 is about 1075.3622610350.

It can be divided in two parts, 1243 and 553212, that added together give a palindrome (554455).

The spelling of 1243553212 in words is "one billion, two hundred forty-three million, five hundred fifty-three thousand, two hundred twelve".