10513421 has 2 divisors, whose sum is σ = 10513422. Its totient is φ = 10513420.

The previous prime is 10513417. The next prime is 10513423. The reversal of 10513421 is 12431501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9523396 + 990025 = 3086^2 + 995^2 .

It is an emirp because it is prime and its reverse (12431501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10513421 - 2² = 10513417 is a prime.

It is a super-2 number, since 2×10513421² = 221064042246482, which contains 22 as substring.

Together with 10513423, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10513421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10513423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5256710 + 5256711.

It is an arithmetic number, because the mean of its divisors is an integer number (5256711).

Almost surely, 2^10513421 is an apocalyptic number.

It is an amenable number.

10513421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10513421 is an equidigital number, since it uses as much as digits as its factorization.

10513421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 10513421 is about 3242.4405931335. The cubic root of 10513421 is about 219.0692149328.

Adding to 10513421 its reverse (12431501), we get a palindrome (22944922).

The spelling of 10513421 in words is "ten million, five hundred thirteen thousand, four hundred twenty-one".