1242858391441 has 16 divisors (see below), whose sum is σ = 1322727106176. Its totient is φ = 1165342121856.

The previous prime is 1242858391429. The next prime is 1242858391493. The reversal of 1242858391441 is 1441938582421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1242858391441 - 2⁵ = 1242858391409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242858397441) 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 15 ways as a sum of consecutive naturals, for example, 1996990 + ... + 2544343.

It is an arithmetic number, because the mean of its divisors is an integer number (82670444136).

Almost surely, 2^{1242858391441} is an apocalyptic number.

It is an amenable number.

1242858391441 is a deficient number, since it is larger than the sum of its proper divisors (79868714735).

1242858391441 is a wasteful number, since it uses less digits than its factorization.

1242858391441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541592.

The product of its digits is 2211840, while the sum is 52.

The spelling of 1242858391441 in words is "one trillion, two hundred forty-two billion, eight hundred fifty-eight million, three hundred ninety-one thousand, four hundred forty-one".