1243740473421 has 8 divisors (see below), whose sum is σ = 1660427776224. Its totient is φ = 828106743120.

The previous prime is 1243740473419. The next prime is 1243740473527.

It is a happy number.

1243740473421 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1243740473421 - 2¹ = 1243740473419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243740473401) 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, 263390370 + ... + 263395091.

It is an arithmetic number, because the mean of its divisors is an integer number (207553472028).

Almost surely, 2^{1243740473421} is an apocalyptic number.

It is an amenable number.

1243740473421 is a deficient number, since it is larger than the sum of its proper divisors (416687302803).

1243740473421 is an equidigital number, since it uses as much as digits as its factorization.

1243740473421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526786251.

The product of its (nonzero) digits is 451584, while the sum is 42.

The spelling of 1243740473421 in words is "one trillion, two hundred forty-three billion, seven hundred forty million, four hundred seventy-three thousand, four hundred twenty-one".