10421020 has 12 divisors (see below), whose sum is σ = 21884184. Its totient is φ = 4168400.

The previous prime is 10421009. The next prime is 10421023. The reversal of 10421020 is 2012401.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10420988 and 10421006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260506 + ... + 260545.

It is an arithmetic number, because the mean of its divisors is an integer number (1823682).

Almost surely, 2^10421020 is an apocalyptic number.

10421020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10421020 is an abundant number, since it is smaller than the sum of its proper divisors (11463164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10421020 is a wasteful number, since it uses less digits than its factorization.

10421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521060 (or 521058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 10421020 is about 3228.1604668913. The cubic root of 10421020 is about 218.4255358425.

Adding to 10421020 its reverse (2012401), we get a palindrome (12433421).

The spelling of 10421020 in words is "ten million, four hundred twenty-one thousand, twenty".