10721645 has 16 divisors (see below), whose sum is σ = 14862528. Its totient is φ = 7338240.

The previous prime is 10721621. The next prime is 10721653. The reversal of 10721645 is 54612701.

It is a de Polignac number, because none of the positive numbers 2^k-10721645 is a prime.

It is a super-3 number, since 3×10721645³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4799 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (928908).

Almost surely, 2^10721645 is an apocalyptic number.

It is an amenable number.

10721645 is a deficient number, since it is larger than the sum of its proper divisors (4140883).

10721645 is a wasteful number, since it uses less digits than its factorization.

10721645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11500.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 10721645 is about 3274.3923100325. The cubic root of 10721645 is about 220.5060321295.

The spelling of 10721645 in words is "ten million, seven hundred twenty-one thousand, six hundred forty-five".