1242696518 has 16 divisors (see below), whose sum is σ = 2139727104. Its totient is φ = 530236680.

The previous prime is 1242696493. The next prime is 1242696547. The reversal of 1242696518 is 8156962421.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192338 + ... + 198693.

It is an arithmetic number, because the mean of its divisors is an integer number (133732944).

Almost surely, 2^1242696518 is an apocalyptic number.

1242696518 is a deficient number, since it is larger than the sum of its proper divisors (897030586).

1242696518 is a wasteful number, since it uses less digits than its factorization.

1242696518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391267.

The product of its digits is 207360, while the sum is 44.

The square root of 1242696518 is about 35251.9009132841. The cubic root of 1242696518 is about 1075.1152623481.

The spelling of 1242696518 in words is "one billion, two hundred forty-two million, six hundred ninety-six thousand, five hundred eighteen".