13121573 has 2 divisors, whose sum is σ = 13121574. Its totient is φ = 13121572.

The previous prime is 13121561. The next prime is 13121593. The reversal of 13121573 is 37512131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11950849 + 1170724 = 3457^2 + 1082^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121573 - 2¹⁴ = 13105189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13121503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560786 + 6560787.

It is an arithmetic number, because the mean of its divisors is an integer number (6560787).

Almost surely, 2^13121573 is an apocalyptic number.

It is an amenable number.

13121573 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121573 is an equidigital number, since it uses as much as digits as its factorization.

13121573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 23.

The square root of 13121573 is about 3622.3711847352. The cubic root of 13121573 is about 235.8641670227.

The spelling of 13121573 in words is "thirteen million, one hundred twenty-one thousand, five hundred seventy-three".