10402221 has 8 divisors (see below), whose sum is σ = 13901440. Its totient is φ = 6918912.

The previous prime is 10402211. The next prime is 10402229. The reversal of 10402221 is 12220401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10402221 - 2¹⁵ = 10369453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10402197 and 10402206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10402229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2356 + ... + 5133.

It is an arithmetic number, because the mean of its divisors is an integer number (1737680).

Almost surely, 2^10402221 is an apocalyptic number.

It is an amenable number.

10402221 is a deficient number, since it is larger than the sum of its proper divisors (3499219).

10402221 is an equidigital number, since it uses as much as digits as its factorization.

10402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7955.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 10402221 is about 3225.2474323686. The cubic root of 10402221 is about 218.2941138626.

Adding to 10402221 its reverse (12220401), we get a palindrome (22622622).

The spelling of 10402221 in words is "ten million, four hundred two thousand, two hundred twenty-one".