1242516019 has 2 divisors, whose sum is σ = 1242516020. Its totient is φ = 1242516018.

The previous prime is 1242515969. The next prime is 1242516031. The reversal of 1242516019 is 9106152421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242516019 - 2⁷ = 1242515891 is a prime.

It is a super-2 number, since 2×1242516019² = 3087692114943216722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1242516619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621258009 + 621258010.

It is an arithmetic number, because the mean of its divisors is an integer number (621258010).

Almost surely, 2^1242516019 is an apocalyptic number.

1242516019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242516019 is an equidigital number, since it uses as much as digits as its factorization.

1242516019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1242516019 is about 35249.3406888696. The cubic root of 1242516019 is about 1075.0632071002.

The spelling of 1242516019 in words is "one billion, two hundred forty-two million, five hundred sixteen thousand, nineteen".