1242617791 has 8 divisors (see below), whose sum is σ = 1281039984. Its totient is φ = 1204582080.

The previous prime is 1242617777. The next prime is 1242617797. The reversal of 1242617791 is 1977162421.

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 1242617791 - 2⁵ = 1242617759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242617797) 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 7 ways as a sum of consecutive naturals, for example, 90085 + ... + 102958.

It is an arithmetic number, because the mean of its divisors is an integer number (160129998).

Almost surely, 2^1242617791 is an apocalyptic number.

1242617791 is a deficient number, since it is larger than the sum of its proper divisors (38422193).

1242617791 is a wasteful number, since it uses less digits than its factorization.

1242617791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193241.

The product of its digits is 42336, while the sum is 40.

The square root of 1242617791 is about 35250.7842607792. The cubic root of 1242617791 is about 1075.0925583906.

The spelling of 1242617791 in words is "one billion, two hundred forty-two million, six hundred seventeen thousand, seven hundred ninety-one".