12091573 has 8 divisors (see below), whose sum is σ = 13787928. Its totient is φ = 10504704.

The previous prime is 12091571. The next prime is 12091577. The reversal of 12091573 is 37519021.

It can be written as a sum of positive squares in 4 ways, for example, as 815409 + 11276164 = 903^2 + 3358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12091573 - 2¹ = 12091571 is a prime.

It is a super-2 number, since 2×12091573² = 292412275228658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12091571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27136 + ... + 27577.

It is an arithmetic number, because the mean of its divisors is an integer number (1723491).

Almost surely, 2^12091573 is an apocalyptic number.

12091573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12091573 is a deficient number, since it is larger than the sum of its proper divisors (1696355).

12091573 is a wasteful number, since it uses less digits than its factorization.

12091573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54743.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 12091573 is about 3477.2939191273. The cubic root of 12091573 is about 229.5237340634.

It can be divided in two parts, 1209157 and 3, that multiplied together give a triangular number (3627471 = T₂₆₉₃).

The spelling of 12091573 in words is "twelve million, ninety-one thousand, five hundred seventy-three".