1211142572 has 12 divisors (see below), whose sum is σ = 2125277280. Its totient is φ = 603920496.

The previous prime is 1211142521. The next prime is 1211142623. The reversal of 1211142572 is 2752411121.

It is an interprime number because it is at equal distance from previous prime (1211142521) and next prime (1211142623).

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 3 ways as a sum of consecutive naturals, for example, 411047 + ... + 413982.

It is an arithmetic number, because the mean of its divisors is an integer number (177106440).

Almost surely, 2^1211142572 is an apocalyptic number.

It is an amenable number.

1211142572 is a deficient number, since it is larger than the sum of its proper divisors (914134708).

1211142572 is a wasteful number, since it uses less digits than its factorization.

1211142572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825400 (or 825398 counting only the distinct ones).

The product of its digits is 1120, while the sum is 26.

The square root of 1211142572 is about 34801.4737044281. The cubic root of 1211142572 is about 1065.9375382138.

Adding to 1211142572 its reverse (2752411121), we get a palindrome (3963553693).

The spelling of 1211142572 in words is "one billion, two hundred eleven million, one hundred forty-two thousand, five hundred seventy-two".