12155975 has 24 divisors (see below), whose sum is σ = 16426032. Its totient is φ = 8870400.

The previous prime is 12155963. The next prime is 12155977. The reversal of 12155975 is 57955121.

It is not a de Polignac number, because 12155975 - 2¹⁴ = 12139591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36560 + ... + 36890.

It is an arithmetic number, because the mean of its divisors is an integer number (684418).

Almost surely, 2^12155975 is an apocalyptic number.

12155975 is a deficient number, since it is larger than the sum of its proper divisors (4270057).

12155975 is a wasteful number, since it uses less digits than its factorization.

12155975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 462 counting only the distinct ones).

The product of its digits is 15750, while the sum is 35.

The square root of 12155975 is about 3486.5419831116. The cubic root of 12155975 is about 229.9305083066.

The spelling of 12155975 in words is "twelve million, one hundred fifty-five thousand, nine hundred seventy-five".