10428421 has 2 divisors, whose sum is σ = 10428422. Its totient is φ = 10428420.

The previous prime is 10428419. The next prime is 10428437. The reversal of 10428421 is 12482401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5827396 + 4601025 = 2414^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 10428421 - 2¹ = 10428419 is a prime.

It is a super-3 number, since 3×10428421³ (a number of 22 digits) contains 333 as substring.

Together with 10428419, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₆₉₁₁₅₀ and since 10428421 and 691150 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 10428392 and 10428401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10428401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5214210 + 5214211.

It is an arithmetic number, because the mean of its divisors is an integer number (5214211).

Almost surely, 2^10428421 is an apocalyptic number.

It is an amenable number.

10428421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10428421 is an equidigital number, since it uses as much as digits as its factorization.

10428421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 10428421 is about 3229.3065819151. The cubic root of 10428421 is about 218.4772321526.

The spelling of 10428421 in words is "ten million, four hundred twenty-eight thousand, four hundred twenty-one".