1242040130 has 16 divisors (see below), whose sum is σ = 2312764920. Its totient is φ = 479684352.

The previous prime is 1242040109. The next prime is 1242040139. The reversal of 1242040130 is 310402421.

It can be written as a sum of positive squares in 4 ways, for example, as 1220593969 + 21446161 = 34937^2 + 4631^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1242040099 and 1242040108.

It is not an unprimeable number, because it can be changed into a prime (1242040139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2141159 + ... + 2141738.

Almost surely, 2^1242040130 is an apocalyptic number.

1242040130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242040130 is a deficient number, since it is larger than the sum of its proper divisors (1070724790).

1242040130 is a wasteful number, since it uses less digits than its factorization.

1242040130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282933.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1242040130 is about 35242.5897175562. The cubic root of 1242040130 is about 1074.9259382905.

Adding to 1242040130 its reverse (310402421), we get a palindrome (1552442551).

The spelling of 1242040130 in words is "one billion, two hundred forty-two million, forty thousand, one hundred thirty".