1242212130 has 48 divisors (see below), whose sum is σ = 3261753144. Its totient is φ = 327974400.

The previous prime is 1242212089. The next prime is 1242212143. The reversal of 1242212130 is 312122421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1230536241 + 11675889 = 35079^2 + 3417^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59239 + ... + 77418.

Almost surely, 2^1242212130 is an apocalyptic number.

1242212130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242212130 is an abundant number, since it is smaller than the sum of its proper divisors (2019541014).

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

1242212130 is a wasteful number, since it uses less digits than its factorization.

1242212130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136771 (or 136768 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1242212130 is about 35245.0298623792. The cubic root of 1242212130 is about 1074.9755552401.

Adding to 1242212130 its reverse (312122421), we get a palindrome (1554334551).

The spelling of 1242212130 in words is "one billion, two hundred forty-two million, two hundred twelve thousand, one hundred thirty".