1211292260 has 12 divisors (see below), whose sum is σ = 2543713788. Its totient is φ = 484516896.

The previous prime is 1211292259. The next prime is 1211292317. The reversal of 1211292260 is 622921121.

It can be written as a sum of positive squares in 2 ways, for example, as 709263424 + 502028836 = 26632^2 + 22406^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30282287 + ... + 30282326.

It is an arithmetic number, because the mean of its divisors is an integer number (211976149).

Almost surely, 2^1211292260 is an apocalyptic number.

1211292260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211292260 is an abundant number, since it is smaller than the sum of its proper divisors (1332421528).

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

1211292260 is a wasteful number, since it uses less digits than its factorization.

1211292260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60564622 (or 60564620 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1211292260 is about 34803.6242365648. The cubic root of 1211292260 is about 1065.9814503259.

The spelling of 1211292260 in words is "one billion, two hundred eleven million, two hundred ninety-two thousand, two hundred sixty".