10721545 has 4 divisors (see below), whose sum is σ = 12865860. Its totient is φ = 8577232.

The previous prime is 10721489. The next prime is 10721549. The reversal of 10721545 is 54512701.

10721545 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1498176 + 9223369 = 1224^2 + 3037^2 .

It is a cyclic number.

It is not a de Polignac number, because 10721545 - 2¹¹ = 10719497 is a prime.

It is a super-2 number, since 2×10721545² = 229903054374050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10721549) 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, 1072150 + ... + 1072159.

It is an arithmetic number, because the mean of its divisors is an integer number (3216465).

Almost surely, 2^10721545 is an apocalyptic number.

It is an amenable number.

10721545 is a deficient number, since it is larger than the sum of its proper divisors (2144315).

10721545 is an equidigital number, since it uses as much as digits as its factorization.

10721545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144314.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 10721545 is about 3274.3770399879. The cubic root of 10721545 is about 220.5053465795.

The spelling of 10721545 in words is "ten million, seven hundred twenty-one thousand, five hundred forty-five".