1211452512 has 48 divisors (see below), whose sum is σ = 3199613760. Its totient is φ = 401334912.

The previous prime is 1211452507. The next prime is 1211452513. The reversal of 1211452512 is 2152541121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×1211452512³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211452513) 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 7 ways as a sum of consecutive naturals, for example, 23062 + ... + 54357.

It is an arithmetic number, because the mean of its divisors is an integer number (66658620).

Almost surely, 2^1211452512 is an apocalyptic number.

1211452512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211452512 is an abundant number, since it is smaller than the sum of its proper divisors (1988161248).

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

1211452512 is a wasteful number, since it uses less digits than its factorization.

1211452512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77595 (or 77587 counting only the distinct ones).

The product of its digits is 800, while the sum is 24.

The square root of 1211452512 is about 34805.9263919235. The cubic root of 1211452512 is about 1066.0284574582.

Adding to 1211452512 its reverse (2152541121), we get a palindrome (3363993633).

The spelling of 1211452512 in words is "one billion, two hundred eleven million, four hundred fifty-two thousand, five hundred twelve".