10408721 has 4 divisors (see below), whose sum is σ = 10585200. Its totient is φ = 10232244.

The previous prime is 10408679. The next prime is 10408733. The reversal of 10408721 is 12780401.

10408721 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10408721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10408771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88151 + ... + 88268.

It is an arithmetic number, because the mean of its divisors is an integer number (2646300).

Almost surely, 2^10408721 is an apocalyptic number.

It is an amenable number.

10408721 is a deficient number, since it is larger than the sum of its proper divisors (176479).

10408721 is an equidigital number, since it uses as much as digits as its factorization.

10408721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176478.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 10408721 is about 3226.2549496281. The cubic root of 10408721 is about 218.3395726257.

The spelling of 10408721 in words is "ten million, four hundred eight thousand, seven hundred twenty-one".