421003043537 has 6 divisors (see below), whose sum is σ = 444327312258. Its totient is φ = 398844988272.

The previous prime is 421003043533. The next prime is 421003043557. The reversal of 421003043537 is 735340300124.

It can be written as a sum of positive squares in only one way, i.e., 406487854096 + 14515189441 = 637564^2 + 120479^2 .

It is not a de Polignac number, because 421003043537 - 2² = 421003043533 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421003043533) 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 5 ways as a sum of consecutive naturals, for example, 583106348 + ... + 583107069.

It is an arithmetic number, because the mean of its divisors is an integer number (74054552043).

Almost surely, 2^421003043537 is an apocalyptic number.

It is an amenable number.

421003043537 is a deficient number, since it is larger than the sum of its proper divisors (23324268721).

421003043537 is a wasteful number, since it uses less digits than its factorization.

421003043537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166213455 (or 1166213436 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 32.

The spelling of 421003043537 in words is "four hundred twenty-one billion, three million, forty-three thousand, five hundred thirty-seven".