1242891326234 has 4 divisors (see below), whose sum is σ = 1864336989354. Its totient is φ = 621445663116.

The previous prime is 1242891326161. The next prime is 1242891326251. The reversal of 1242891326234 is 4326231982421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 996133744225 + 246757582009 = 998065^2 + 496747^2 .

It is a super-2 number, since 2×1242891326234² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310722831557 + ... + 310722831560.

Almost surely, 2^{1242891326234} is an apocalyptic number.

1242891326234 is a deficient number, since it is larger than the sum of its proper divisors (621445663120).

1242891326234 is an equidigital number, since it uses as much as digits as its factorization.

1242891326234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621445663119.

The product of its digits is 995328, while the sum is 47.

The spelling of 1242891326234 in words is "one trillion, two hundred forty-two billion, eight hundred ninety-one million, three hundred twenty-six thousand, two hundred thirty-four".