10638521 has 4 divisors (see below), whose sum is σ = 10703952. Its totient is φ = 10573092.

The previous prime is 10638517. The next prime is 10638533. The reversal of 10638521 is 12583601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10638521 - 2² = 10638517 is a prime.

It is a super-2 number, since 2×10638521² = 226356258134882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10638541) 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 3 ways as a sum of consecutive naturals, for example, 32471 + ... + 32796.

It is an arithmetic number, because the mean of its divisors is an integer number (2675988).

Almost surely, 2^10638521 is an apocalyptic number.

It is an amenable number.

10638521 is a deficient number, since it is larger than the sum of its proper divisors (65431).

10638521 is an equidigital number, since it uses as much as digits as its factorization.

10638521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65430.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 10638521 is about 3261.6745699104. The cubic root of 10638521 is about 219.9346982495.

The spelling of 10638521 in words is "ten million, six hundred thirty-eight thousand, five hundred twenty-one".