1211159952 has 50 divisors (see below), whose sum is σ = 3505452038. Its totient is φ = 403719552.

The previous prime is 1211159947. The next prime is 1211159993. The reversal of 1211159952 is 2599511121.

1211159952 is a `hidden beast` number, since 1 + 2 + 1 + 11 + 599 + 52 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1087416576 + 123743376 = 32976^2 + 11124^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 9 ways as a sum of consecutive naturals, for example, 465973 + ... + 468564.

Almost surely, 2^1211159952 is an apocalyptic number.

1211159952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211159952 is an abundant number, since it is smaller than the sum of its proper divisors (2294292086).

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

1211159952 is an equidigital number, since it uses as much as digits as its factorization.

1211159952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934557 (or 934542 counting only the distinct ones).

The product of its digits is 8100, while the sum is 36.

The square root of 1211159952 is about 34801.7234056016. The cubic root of 1211159952 is about 1065.9426369545.

The spelling of 1211159952 in words is "one billion, two hundred eleven million, one hundred fifty-nine thousand, nine hundred fifty-two".