10731721 has 32 divisors (see below), whose sum is σ = 14708736. Its totient is φ = 7560000.

The previous prime is 10731703. The next prime is 10731727. The reversal of 10731721 is 12713701.

It is not a de Polignac number, because 10731721 - 2¹¹ = 10729673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10731692 and 10731701.

It is not an unprimeable number, because it can be changed into a prime (10731727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70996 + ... + 71146.

It is an arithmetic number, because the mean of its divisors is an integer number (459648).

Almost surely, 2^10731721 is an apocalyptic number.

10731721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10731721 is a deficient number, since it is larger than the sum of its proper divisors (3977015).

10731721 is a wasteful number, since it uses less digits than its factorization.

10731721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 10731721 is about 3275.9305548195. The cubic root of 10731721 is about 220.5750863071.

The spelling of 10731721 in words is "ten million, seven hundred thirty-one thousand, seven hundred twenty-one".