1242415091 has 8 divisors (see below), whose sum is σ = 1255956240. Its totient is φ = 1228889088.

The previous prime is 1242415079. The next prime is 1242415093. The reversal of 1242415091 is 1905142421.

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 1242415091 - 2²⁶ = 1175306227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242415093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255515 + ... + 260331.

It is an arithmetic number, because the mean of its divisors is an integer number (156994530).

Almost surely, 2^1242415091 is an apocalyptic number.

1242415091 is a deficient number, since it is larger than the sum of its proper divisors (13541149).

1242415091 is an equidigital number, since it uses as much as digits as its factorization.

1242415091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7573.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1242415091 is about 35247.9090301822. The cubic root of 1242415091 is about 1075.0340976385.

The spelling of 1242415091 in words is "one billion, two hundred forty-two million, four hundred fifteen thousand, ninety-one".