10126721 has 8 divisors (see below), whose sum is σ = 11146464. Its totient is φ = 9123520.

The previous prime is 10126717. The next prime is 10126723. The reversal of 10126721 is 12762101.

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 10126721 - 2² = 10126717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10126693 and 10126702.

It is not an unprimeable number, because it can be changed into a prime (10126723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2831 + ... + 5316.

It is an arithmetic number, because the mean of its divisors is an integer number (1393308).

Almost surely, 2^10126721 is an apocalyptic number.

10126721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10126721 is a deficient number, since it is larger than the sum of its proper divisors (1019743).

10126721 is a wasteful number, since it uses less digits than its factorization.

10126721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8271.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 10126721 is about 3182.2509329090. The cubic root of 10126721 is about 216.3496921925.

Adding to 10126721 its reverse (12762101), we get a palindrome (22888822).

The spelling of 10126721 in words is "ten million, one hundred twenty-six thousand, seven hundred twenty-one".