1242124019 has 4 divisors (see below), whose sum is σ = 1242232296. Its totient is φ = 1242015744.

The previous prime is 1242124007. The next prime is 1242124021. The reversal of 1242124019 is 9104212421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1242124019 - 2²⁸ = 973688563 is a prime.

It is a super-2 number, since 2×1242124019² = 3085744157153424722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242124519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34574 + ... + 60659.

It is an arithmetic number, because the mean of its divisors is an integer number (310558074).

Almost surely, 2^1242124019 is an apocalyptic number.

1242124019 is a deficient number, since it is larger than the sum of its proper divisors (108277).

1242124019 is an equidigital number, since it uses as much as digits as its factorization.

1242124019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108276.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1242124019 is about 35243.7798625516. The cubic root of 1242124019 is about 1074.9501383760.

The spelling of 1242124019 in words is "one billion, two hundred forty-two million, one hundred twenty-four thousand, nineteen".