10351721 has 4 divisors (see below), whose sum is σ = 10604244. Its totient is φ = 10099200.

The previous prime is 10351717. The next prime is 10351741. The reversal of 10351721 is 12715301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12715301 = 31 ⋅410171.

It can be written as a sum of positive squares in 2 ways, for example, as 3534400 + 6817321 = 1880^2 + 2611^2 .

It is a cyclic number.

It is not a de Polignac number, because 10351721 - 2² = 10351717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10351693 and 10351702.

It is not an unprimeable number, because it can be changed into a prime (10351711) 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, 126200 + ... + 126281.

It is an arithmetic number, because the mean of its divisors is an integer number (2651061).

Almost surely, 2^10351721 is an apocalyptic number.

It is an amenable number.

10351721 is a deficient number, since it is larger than the sum of its proper divisors (252523).

10351721 is an equidigital number, since it uses as much as digits as its factorization.

10351721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252522.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 10351721 is about 3217.4090507736. The cubic root of 10351721 is about 217.9402874921.

The spelling of 10351721 in words is "ten million, three hundred fifty-one thousand, seven hundred twenty-one".