12611958 has 32 divisors (see below), whose sum is σ = 26784000. Its totient is φ = 3950496.

The previous prime is 12611957. The next prime is 12611987. The reversal of 12611958 is 85911621.

It is a super-2 number, since 2×12611958² = 318122969187528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12611957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7368 + ... + 8916.

It is an arithmetic number, because the mean of its divisors is an integer number (837000).

Almost surely, 2^12611958 is an apocalyptic number.

12611958 is an abundant number, since it is smaller than the sum of its proper divisors (14172042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12611958 is a wasteful number, since it uses less digits than its factorization.

12611958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its digits is 4320, while the sum is 33.

The square root of 12611958 is about 3551.3318628368. The cubic root of 12611958 is about 232.7702672789.

The spelling of 12611958 in words is "twelve million, six hundred eleven thousand, nine hundred fifty-eight".