10421001 has 32 divisors (see below), whose sum is σ = 16369920. Its totient is φ = 6538752.

The previous prime is 10420999. The next prime is 10421003. The reversal of 10421001 is 10012401.

It is a happy number.

10421001 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (10420999) and next prime (10421003).

It is not a de Polignac number, because 10421001 - 2¹ = 10420999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10421003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60151 + ... + 60323.

It is an arithmetic number, because the mean of its divisors is an integer number (511560).

Almost surely, 2^10421001 is an apocalyptic number.

It is an amenable number.

10421001 is a deficient number, since it is larger than the sum of its proper divisors (5948919).

10421001 is a wasteful number, since it uses less digits than its factorization.

10421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 10421001 is about 3228.1575240375. The cubic root of 10421001 is about 218.4254030951.

Adding to 10421001 its reverse (10012401), we get a palindrome (20433402).

The spelling of 10421001 in words is "ten million, four hundred twenty-one thousand, one".