1211289652 has 12 divisors (see below), whose sum is σ = 2120825056. Its totient is φ = 605339640.

The previous prime is 1211289643. The next prime is 1211289659. The reversal of 1211289652 is 2569821121.

It is a super-2 number, since 2×1211289652² = 2934445242084562208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211289659) by changing a digit.

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, 67248 + ... + 83335.

Almost surely, 2^1211289652 is an apocalyptic number.

It is an amenable number.

1211289652 is a deficient number, since it is larger than the sum of its proper divisors (909535404).

1211289652 is a wasteful number, since it uses less digits than its factorization.

1211289652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152598 (or 152596 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 1211289652 is about 34803.5867691823. The cubic root of 1211289652 is about 1065.9806852802.

The spelling of 1211289652 in words is "one billion, two hundred eleven million, two hundred eighty-nine thousand, six hundred fifty-two".