12661415 has 16 divisors (see below), whose sum is σ = 16765056. Its totient is φ = 9120000.

The previous prime is 12661399. The next prime is 12661433. The reversal of 12661415 is 51416621.

It is not a de Polignac number, because 12661415 - 2⁴ = 12661399 is a prime.

It is a super-2 number, since 2×12661415² = 320622859604450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 290 + ... + 5040.

It is an arithmetic number, because the mean of its divisors is an integer number (1047816).

Almost surely, 2^12661415 is an apocalyptic number.

12661415 is a deficient number, since it is larger than the sum of its proper divisors (4103641).

12661415 is a wasteful number, since it uses less digits than its factorization.

12661415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810.

The product of its digits is 1440, while the sum is 26.

The square root of 12661415 is about 3558.2882120480. The cubic root of 12661415 is about 233.0741350788.

The spelling of 12661415 in words is "twelve million, six hundred sixty-one thousand, four hundred fifteen".