12605450131 has 4 divisors (see below), whose sum is σ = 12606743992. Its totient is φ = 12604156272.

The previous prime is 12605450107. The next prime is 12605450141. The reversal of 12605450131 is 13105450621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13105450621 = 19 ⋅689760559.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12605450131 is a prime.

It is a super-2 number, since 2×12605450131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12605450131.

It is not an unprimeable number, because it can be changed into a prime (12605450101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632205 + ... + 651838.

It is an arithmetic number, because the mean of its divisors is an integer number (3151685998).

Almost surely, 2^12605450131 is an apocalyptic number.

12605450131 is a deficient number, since it is larger than the sum of its proper divisors (1293861).

12605450131 is an equidigital number, since it uses as much as digits as its factorization.

12605450131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293860.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 12605450131 in words is "twelve billion, six hundred five million, four hundred fifty thousand, one hundred thirty-one".