10545421 has 2 divisors, whose sum is σ = 10545422. Its totient is φ = 10545420.

The previous prime is 10545419. The next prime is 10545443. The reversal of 10545421 is 12454501.

It is an a-pointer prime, because the next prime (10545443) can be obtained adding 10545421 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9517225 + 1028196 = 3085^2 + 1014^2 .

It is an emirp because it is prime and its reverse (12454501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10545421 - 2¹ = 10545419 is a prime.

It is a super-2 number, since 2×10545421² = 222411808134482, which contains 22 as substring.

Together with 10545419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 10545392 and 10545401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10545121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5272710 + 5272711.

It is an arithmetic number, because the mean of its divisors is an integer number (5272711).

Almost surely, 2^10545421 is an apocalyptic number.

It is an amenable number.

10545421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10545421 is an equidigital number, since it uses as much as digits as its factorization.

10545421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 10545421 is about 3247.3713985314. The cubic root of 10545421 is about 219.2912522215.

Adding to 10545421 its reverse (12454501), we get a palindrome (22999922).

The spelling of 10545421 in words is "ten million, five hundred forty-five thousand, four hundred twenty-one".