1242649659 has 8 divisors (see below), whose sum is σ = 1659811392. Its totient is φ = 826960520.

The previous prime is 1242649657. The next prime is 1242649687. The reversal of 1242649659 is 9569462421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242649659 - 2¹ = 1242649657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242649657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366177 + ... + 369554.

It is an arithmetic number, because the mean of its divisors is an integer number (207476424).

Almost surely, 2^1242649659 is an apocalyptic number.

1242649659 is a deficient number, since it is larger than the sum of its proper divisors (417161733).

1242649659 is an equidigital number, since it uses as much as digits as its factorization.

1242649659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736297.

The product of its digits is 933120, while the sum is 48.

The square root of 1242649659 is about 35251.2362761932. The cubic root of 1242649659 is about 1075.1017488692.

The spelling of 1242649659 in words is "one billion, two hundred forty-two million, six hundred forty-nine thousand, six hundred fifty-nine".