10521715 has 4 divisors (see below), whose sum is σ = 12626064. Its totient is φ = 8417368.

The previous prime is 10521697. The next prime is 10521733. The reversal of 10521715 is 51712501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51712501 = 4993 ⋅10357.

It is an interprime number because it is at equal distance from previous prime (10521697) and next prime (10521733).

It is a cyclic number.

It is not a de Polignac number, because 10521715 - 2⁵ = 10521683 is a prime.

It is a super-2 number, since 2×10521715² = 221412973082450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052167 + ... + 1052176.

It is an arithmetic number, because the mean of its divisors is an integer number (3156516).

Almost surely, 2^10521715 is an apocalyptic number.

10521715 is a deficient number, since it is larger than the sum of its proper divisors (2104349).

10521715 is an equidigital number, since it uses as much as digits as its factorization.

10521715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104348.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 10521715 is about 3243.7193158472. The cubic root of 10521715 is about 219.1268074291.

It can be divided in two parts, 10521 and 715, that added together give a square (11236 = 106²).

The spelling of 10521715 in words is "ten million, five hundred twenty-one thousand, seven hundred fifteen".