1242921659 has 16 divisors (see below), whose sum is σ = 1440964800. Its totient is φ = 1050102144.

The previous prime is 1242921653. The next prime is 1242921707. The reversal of 1242921659 is 9561292421.

It is a de Polignac number, because none of the positive numbers 2^k-1242921659 is a prime.

It is a super-2 number, since 2×1242921659² = 3089708500822624562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242921653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146177 + ... + 154445.

It is an arithmetic number, because the mean of its divisors is an integer number (90060300).

Almost surely, 2^1242921659 is an apocalyptic number.

1242921659 is a deficient number, since it is larger than the sum of its proper divisors (198043141).

1242921659 is a wasteful number, since it uses less digits than its factorization.

1242921659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8582.

The product of its digits is 77760, while the sum is 41.

The square root of 1242921659 is about 35255.0940858197. The cubic root of 1242921659 is about 1075.1801851204.

The spelling of 1242921659 in words is "one billion, two hundred forty-two million, nine hundred twenty-one thousand, six hundred fifty-nine".