14001021 has 12 divisors (see below), whose sum is σ = 20468448. Its totient is φ = 9221064.

The previous prime is 14001019. The next prime is 14001023. The reversal of 14001021 is 12010041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (14001019) and next prime (14001023).

It is not a de Polignac number, because 14001021 - 2¹ = 14001019 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 14000994 and 14001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14001023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8625 + ... + 10118.

It is an arithmetic number, because the mean of its divisors is an integer number (1705704).

Almost surely, 2^14001021 is an apocalyptic number.

It is an amenable number.

14001021 is a deficient number, since it is larger than the sum of its proper divisors (6467427).

14001021 is a wasteful number, since it uses less digits than its factorization.

14001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18832 (or 18829 counting only the distinct ones).

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

The square root of 14001021 is about 3741.7938211505. The cubic root of 14001021 is about 241.0200852162.

Adding to 14001021 its reverse (12010041), we get a palindrome (26011062).

The spelling of 14001021 in words is "fourteen million, one thousand, twenty-one".