1211255588 has 18 divisors (see below), whose sum is σ = 2139762786. Its totient is φ = 599901568.

The previous prime is 1211255537. The next prime is 1211255609. The reversal of 1211255588 is 8855521121.

It can be written as a sum of positive squares in 3 ways, for example, as 324288064 + 886967524 = 18008^2 + 29782^2 .

It is a super-2 number, since 2×1211255588² = 2934280198922451488, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 739106 + ... + 740742.

Almost surely, 2^1211255588 is an apocalyptic number.

It is an amenable number.

1211255588 is a deficient number, since it is larger than the sum of its proper divisors (928507198).

1211255588 is an equidigital number, since it uses as much as digits as its factorization.

1211255588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391 (or 1752 counting only the distinct ones).

The product of its digits is 32000, while the sum is 38.

The square root of 1211255588 is about 34803.0973908932. The cubic root of 1211255588 is about 1065.9706926507.

The spelling of 1211255588 in words is "one billion, two hundred eleven million, two hundred fifty-five thousand, five hundred eighty-eight".