10689121 has 4 divisors (see below), whose sum is σ = 10839744. Its totient is φ = 10538500.

The previous prime is 10689103. The next prime is 10689127. The reversal of 10689121 is 12198601.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12198601 = 229 ⋅53269.

It is a cyclic number.

It is not a de Polignac number, because 10689121 - 2⁹ = 10688609 is a prime.

It is a super-2 number, since 2×10689121² = 228514615505282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10689121.

It is not an unprimeable number, because it can be changed into a prime (10689127) 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, 75205 + ... + 75346.

It is an arithmetic number, because the mean of its divisors is an integer number (2709936).

Almost surely, 2^10689121 is an apocalyptic number.

It is an amenable number.

10689121 is a deficient number, since it is larger than the sum of its proper divisors (150623).

10689121 is an equidigital number, since it uses as much as digits as its factorization.

10689121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150622.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 10689121 is about 3269.4221201919. The cubic root of 10689121 is about 220.2828386975.

The spelling of 10689121 in words is "ten million, six hundred eighty-nine thousand, one hundred twenty-one".