10971521 has 16 divisors (see below), whose sum is σ = 12374208. Its totient is φ = 9643200.

The previous prime is 10971503. The next prime is 10971523. The reversal of 10971521 is 12517901.

It is a cyclic number.

It is not a de Polignac number, because 10971521 - 2²² = 6777217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10971523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55595 + ... + 55791.

It is an arithmetic number, because the mean of its divisors is an integer number (773388).

Almost surely, 2^10971521 is an apocalyptic number.

10971521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10971521 is a deficient number, since it is larger than the sum of its proper divisors (1402687).

10971521 is a wasteful number, since it uses less digits than its factorization.

10971521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 10971521 is about 3312.3286370769. The cubic root of 10971521 is about 222.2059137013.

The spelling of 10971521 in words is "ten million, nine hundred seventy-one thousand, five hundred twenty-one".