1242381005 has 8 divisors (see below), whose sum is σ = 1531150872. Its totient is φ = 967042368.

The previous prime is 1242380981. The next prime is 1242381031. The reversal of 1242381005 is 5001832421.

It can be written as a sum of positive squares in 4 ways, for example, as 111471364 + 1130909641 = 10558^2 + 33629^2 .

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 1242381005 - 2¹² = 1242376909 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3357602 + ... + 3357971.

It is an arithmetic number, because the mean of its divisors is an integer number (191393859).

Almost surely, 2^1242381005 is an apocalyptic number.

It is an amenable number.

1242381005 is a deficient number, since it is larger than the sum of its proper divisors (288769867).

1242381005 is an equidigital number, since it uses as much as digits as its factorization.

1242381005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6715615.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1242381005 is about 35247.4255088226. The cubic root of 1242381005 is about 1075.0242662631.

The spelling of 1242381005 in words is "one billion, two hundred forty-two million, three hundred eighty-one thousand, five".