13173021 has 12 divisors (see below), whose sum is σ = 19064448. Its totient is φ = 8765064.

The previous prime is 13173001. The next prime is 13173029. The reversal of 13173021 is 12037131.

It is not a de Polignac number, because 13173021 - 2⁷ = 13172893 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13172985 and 13173003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13173029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5076 + ... + 7218.

It is an arithmetic number, because the mean of its divisors is an integer number (1588704).

Almost surely, 2^13173021 is an apocalyptic number.

It is an amenable number.

13173021 is a deficient number, since it is larger than the sum of its proper divisors (5891427).

13173021 is a wasteful number, since it uses less digits than its factorization.

13173021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832 (or 2829 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 13173021 is about 3629.4656631521. The cubic root of 13173021 is about 236.1720293635.

The spelling of 13173021 in words is "thirteen million, one hundred seventy-three thousand, twenty-one".