1242112873 has 2 divisors, whose sum is σ = 1242112874. Its totient is φ = 1242112872.

The previous prime is 1242112853. The next prime is 1242112877. The reversal of 1242112873 is 3782112421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1067132889 + 174979984 = 32667^2 + 13228^2 .

It is an emirp because it is prime and its reverse (3782112421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242112873 - 2⁵ = 1242112841 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242112877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621056436 + 621056437.

It is an arithmetic number, because the mean of its divisors is an integer number (621056437).

Almost surely, 2^1242112873 is an apocalyptic number.

It is an amenable number.

1242112873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242112873 is an equidigital number, since it uses as much as digits as its factorization.

1242112873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 1242112873 is about 35243.6217350033. The cubic root of 1242112873 is about 1074.9469230690.

The spelling of 1242112873 in words is "one billion, two hundred forty-two million, one hundred twelve thousand, eight hundred seventy-three".