421003043 has 4 divisors (see below), whose sum is σ = 421082688. Its totient is φ = 420923400.

The previous prime is 421003039. The next prime is 421003069. The reversal of 421003043 is 340300124.

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

It is a cyclic number.

It is not a de Polignac number, because 421003043 - 2² = 421003039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421003003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31283 + ... + 42668.

It is an arithmetic number, because the mean of its divisors is an integer number (105270672).

Almost surely, 2^421003043 is an apocalyptic number.

421003043 is a deficient number, since it is larger than the sum of its proper divisors (79645).

421003043 is an equidigital number, since it uses as much as digits as its factorization.

421003043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79644.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 421003043 is about 20518.3586819219. The cubic root of 421003043 is about 749.4829283385.

Adding to 421003043 its reverse (340300124), we get a palindrome (761303167).

The spelling of 421003043 in words is "four hundred twenty-one million, three thousand, forty-three".