421003031 has 4 divisors (see below), whose sum is σ = 421660464. Its totient is φ = 420345600.

The previous prime is 421003027. The next prime is 421003039. The reversal of 421003031 is 130300124.

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 421003031 - 2² = 421003027 is a prime.

It is a super-2 number, since 2×421003031² = 354487104222373922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421002997 and 421003015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421003039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327755 + ... + 329036.

It is an arithmetic number, because the mean of its divisors is an integer number (105415116).

Almost surely, 2^421003031 is an apocalyptic number.

421003031 is a deficient number, since it is larger than the sum of its proper divisors (657433).

421003031 is an equidigital number, since it uses as much as digits as its factorization.

421003031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657432.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 421003031 is about 20518.3583895009. The cubic root of 421003031 is about 749.4829212176.

Adding to 421003031 its reverse (130300124), we get a palindrome (551303155).

The spelling of 421003031 in words is "four hundred twenty-one million, three thousand, thirty-one".