1211530752 has 120 divisors (see below), whose sum is σ = 3520192104. Its totient is φ = 401117184.

The previous prime is 1211530741. The next prime is 1211530759. The reversal of 1211530752 is 2570351121.

1211530752 is a `hidden beast` number, since 121 + 1 + 530 + 7 + 5 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211530759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 750298 + ... + 751910.

Almost surely, 2^1211530752 is an apocalyptic number.

1211530752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211530752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1760096052).

1211530752 is an abundant number, since it is smaller than the sum of its proper divisors (2308661352).

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

1211530752 is a wasteful number, since it uses less digits than its factorization.

1211530752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800 (or 1781 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 1211530752 is about 34807.0503203015. The cubic root of 1211530752 is about 1066.0514062931.

Adding to 1211530752 its reverse (2570351121), we get a palindrome (3781881873).

The spelling of 1211530752 in words is "one billion, two hundred eleven million, five hundred thirty thousand, seven hundred fifty-two".