12561073 has 4 divisors (see below), whose sum is σ = 14355520. Its totient is φ = 10766628.

The previous prime is 12561061. The next prime is 12561083. The reversal of 12561073 is 37016521.

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.

It is a cyclic number.

It is not a de Polignac number, because 12561073 - 2¹⁷ = 12430001 is a prime.

It is a super-2 number, since 2×12561073² = 315561109822658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12561023) 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, 897213 + ... + 897226.

It is an arithmetic number, because the mean of its divisors is an integer number (3588880).

Almost surely, 2^12561073 is an apocalyptic number.

It is an amenable number.

12561073 is a deficient number, since it is larger than the sum of its proper divisors (1794447).

12561073 is an equidigital number, since it uses as much as digits as its factorization.

12561073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794446.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 12561073 is about 3544.1604083337. The cubic root of 12561073 is about 232.4567954560.

Adding to 12561073 its reverse (37016521), we get a palindrome (49577594).

The spelling of 12561073 in words is "twelve million, five hundred sixty-one thousand, seventy-three".