10400421 has 8 divisors (see below), whose sum is σ = 13927680. Its totient is φ = 6903392.

The previous prime is 10400417. The next prime is 10400431. The reversal of 10400421 is 12400401.

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

It is a cyclic number.

It is not a de Polignac number, because 10400421 - 2² = 10400417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10400397 and 10400406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10400431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6741 + ... + 8138.

It is an arithmetic number, because the mean of its divisors is an integer number (1740960).

Almost surely, 2^10400421 is an apocalyptic number.

It is an amenable number.

10400421 is a deficient number, since it is larger than the sum of its proper divisors (3527259).

10400421 is a wasteful number, since it uses less digits than its factorization.

10400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15115.

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

The square root of 10400421 is about 3224.9683719379. The cubic root of 10400421 is about 218.2815219340.

Adding to 10400421 its reverse (12400401), we get a palindrome (22800822).

The spelling of 10400421 in words is "ten million, four hundred thousand, four hundred twenty-one".