13055921 has 4 divisors (see below), whose sum is σ = 13072500. Its totient is φ = 13039344.

The previous prime is 13055897. The next prime is 13055923. The reversal of 13055921 is 12955031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12955031 = 103 ⋅125777.

It can be written as a sum of positive squares in 2 ways, for example, as 3045025 + 10010896 = 1745^2 + 3164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13055921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13055923) 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, 7046 + ... + 8703.

It is an arithmetic number, because the mean of its divisors is an integer number (3268125).

Almost surely, 2^13055921 is an apocalyptic number.

It is an amenable number.

13055921 is a deficient number, since it is larger than the sum of its proper divisors (16579).

13055921 is an equidigital number, since it uses as much as digits as its factorization.

13055921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16578.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 13055921 is about 3613.2978011783. The cubic root of 13055921 is about 235.4701377413.

The spelling of 13055921 in words is "thirteen million, fifty-five thousand, nine hundred twenty-one".