1242018587 has 2 divisors, whose sum is σ = 1242018588. Its totient is φ = 1242018586.

The previous prime is 1242018559. The next prime is 1242018593. The reversal of 1242018587 is 7858102421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1242018587 - 2¹⁰ = 1242017563 is a prime.

It is a super-2 number, since 2×1242018587² = 3085220340906953138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1242018587.

It is not a weakly prime, because it can be changed into another prime (1242038587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621009293 + 621009294.

It is an arithmetic number, because the mean of its divisors is an integer number (621009294).

Almost surely, 2^1242018587 is an apocalyptic number.

1242018587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242018587 is an equidigital number, since it uses as much as digits as its factorization.

1242018587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 1242018587 is about 35242.2840775112. The cubic root of 1242018587 is about 1074.9197234448.

The spelling of 1242018587 in words is "one billion, two hundred forty-two million, eighteen thousand, five hundred eighty-seven".