10401721 has 16 divisors (see below), whose sum is σ = 12058560. Its totient is φ = 8873280.

The previous prime is 10401719. The next prime is 10401733. The reversal of 10401721 is 12710401.

It is a cyclic number.

It is not a de Polignac number, because 10401721 - 2¹ = 10401719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10401695 and 10401704.

It is not an unprimeable number, because it can be changed into a prime (10401421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32655 + ... + 32971.

It is an arithmetic number, because the mean of its divisors is an integer number (753660).

Almost surely, 2^10401721 is an apocalyptic number.

10401721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10401721 is a deficient number, since it is larger than the sum of its proper divisors (1656839).

10401721 is a wasteful number, since it uses less digits than its factorization.

10401721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 10401721 is about 3225.1699180043. The cubic root of 10401721 is about 218.2906162504.

The spelling of 10401721 in words is "ten million, four hundred one thousand, seven hundred twenty-one".