10721493 has 6 divisors (see below), whose sum is σ = 15486614. Its totient is φ = 7147656.

The previous prime is 10721489. The next prime is 10721549. The reversal of 10721493 is 39412701.

10721493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10614564 + 106929 = 3258^2 + 327^2 .

It is not a de Polignac number, because 10721493 - 2² = 10721489 is a prime.

It is a super-2 number, since 2×10721493² = 229900824298098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 595630 + ... + 595647.

Almost surely, 2^10721493 is an apocalyptic number.

It is an amenable number.

10721493 is a deficient number, since it is larger than the sum of its proper divisors (4765121).

10721493 is a wasteful number, since it uses less digits than its factorization.

10721493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191283 (or 1191280 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 10721493 is about 3274.3690995366. The cubic root of 10721493 is about 220.5049900918.

The spelling of 10721493 in words is "ten million, seven hundred twenty-one thousand, four hundred ninety-three".