1212004240 has 20 divisors (see below), whose sum is σ = 2817910044. Its totient is φ = 484801664.

The previous prime is 1212004231. The next prime is 1212004253. The reversal of 1212004240 is 424002121.

It can be written as a sum of positive squares in 2 ways, for example, as 310323456 + 901680784 = 17616^2 + 30028^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7574947 + ... + 7575106.

Almost surely, 2^1212004240 is an apocalyptic number.

1212004240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212004240 is an abundant number, since it is smaller than the sum of its proper divisors (1605905804).

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

1212004240 is a wasteful number, since it uses less digits than its factorization.

1212004240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15150066 (or 15150060 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1212004240 is about 34813.8512664141. The cubic root of 1212004240 is about 1066.1902655571.

Adding to 1212004240 its reverse (424002121), we get a palindrome (1636006361).

The spelling of 1212004240 in words is "one billion, two hundred twelve million, four thousand, two hundred forty".