1205143212 has 48 divisors (see below), whose sum is σ = 3460927232. Its totient is φ = 317839680.

The previous prime is 1205143207. The next prime is 1205143237. The reversal of 1205143212 is 2123415021.

It is a super-2 number, since 2×1205143212² = 2904740322859353888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550714 + ... + 552897.

Almost surely, 2^1205143212 is an apocalyptic number.

1205143212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1205143212 is an abundant number, since it is smaller than the sum of its proper divisors (2255784020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205143212 is a wasteful number, since it uses less digits than its factorization.

1205143212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103638 (or 1103636 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1205143212 is about 34715.1726482816. The cubic root of 1205143212 is about 1064.1745937603.

Adding to 1205143212 its reverse (2123415021), we get a palindrome (3328558233).

Subtracting 1205143212 from its reverse (2123415021), we obtain a square (918271809 = 30303²).

The spelling of 1205143212 in words is "one billion, two hundred five million, one hundred forty-three thousand, two hundred twelve".