403430421 has 4 divisors (see below), whose sum is σ = 537907232. Its totient is φ = 268953612.

The previous prime is 403430411. The next prime is 403430431. The reversal of 403430421 is 124034304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (403430411) and next prime (403430431).

It is not a de Polignac number, because 403430421 - 2¹⁵ = 403397653 is a prime.

It is a super-2 number, since 2×403430421² = 325512209176474482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403430411) 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 3 ways as a sum of consecutive naturals, for example, 67238401 + ... + 67238406.

It is an arithmetic number, because the mean of its divisors is an integer number (134476808).

Almost surely, 2^403430421 is an apocalyptic number.

It is an amenable number.

403430421 is a deficient number, since it is larger than the sum of its proper divisors (134476811).

403430421 is a wasteful number, since it uses less digits than its factorization.

403430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134476810.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 403430421 is about 20085.5774375545. The cubic root of 403430421 is about 738.9066035196.

Adding to 403430421 its reverse (124034304), we get a palindrome (527464725).

The spelling of 403430421 in words is "four hundred three million, four hundred thirty thousand, four hundred twenty-one".