1212312260 has 24 divisors (see below), whose sum is σ = 2556982680. Its totient is φ = 482805504.

The previous prime is 1212312239. The next prime is 1212312307. The reversal of 1212312260 is 622132121.

It can be written as a sum of positive squares in 4 ways, for example, as 175085824 + 1037226436 = 13232^2 + 32206^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127769 + ... + 136928.

It is an arithmetic number, because the mean of its divisors is an integer number (106540945).

Almost surely, 2^1212312260 is an apocalyptic number.

1212312260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212312260 is an abundant number, since it is smaller than the sum of its proper divisors (1344670420).

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

1212312260 is a wasteful number, since it uses less digits than its factorization.

1212312260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264935 (or 264933 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1212312260 is about 34818.2747993062. The cubic root of 1212312260 is about 1066.2805788025.

Adding to 1212312260 its reverse (622132121), we get a palindrome (1834444381).

The spelling of 1212312260 in words is "one billion, two hundred twelve million, three hundred twelve thousand, two hundred sixty".