10421421 has 16 divisors (see below), whose sum is σ = 14340480. Its totient is φ = 6727680.

The previous prime is 10421417. The next prime is 10421429. The reversal of 10421421 is 12412401.

10421421 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10421421 - 2² = 10421417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10421421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23520 + ... + 23958.

It is an arithmetic number, because the mean of its divisors is an integer number (896280).

Almost surely, 2^10421421 is an apocalyptic number.

It is an amenable number.

10421421 is a deficient number, since it is larger than the sum of its proper divisors (3919059).

10421421 is a wasteful number, since it uses less digits than its factorization.

10421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 10421421 is about 3228.2225759696. Note that the first 3 decimals coincide. The cubic root of 10421421 is about 218.4283374721.

Adding to 10421421 its reverse (12412401), we get a palindrome (22833822).

The spelling of 10421421 in words is "ten million, four hundred twenty-one thousand, four hundred twenty-one".