10302421 has 4 divisors (see below), whose sum is σ = 10308844. Its totient is φ = 10296000.

The previous prime is 10302407. The next prime is 10302443. The reversal of 10302421 is 12420301.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12420301 = 79 ⋅157219.

It can be written as a sum of positive squares in 2 ways, for example, as 624100 + 9678321 = 790^2 + 3111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10302421 is a prime.

It is a super-2 number, since 2×10302421² = 212279756922482, 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 (10302451) 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, 1471 + ... + 4771.

It is an arithmetic number, because the mean of its divisors is an integer number (2577211).

Almost surely, 2^10302421 is an apocalyptic number.

It is an amenable number.

10302421 is a deficient number, since it is larger than the sum of its proper divisors (6423).

10302421 is an equidigital number, since it uses as much as digits as its factorization.

10302421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6422.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 10302421 is about 3209.7384628658. The cubic root of 10302421 is about 217.5937570860.

Adding to 10302421 its reverse (12420301), we get a palindrome (22722722).

The spelling of 10302421 in words is "ten million, three hundred two thousand, four hundred twenty-one".