12155943 has 16 divisors (see below), whose sum is σ = 16832480. Its totient is φ = 7796736.

The previous prime is 12155933. The next prime is 12155951. The reversal of 12155943 is 34955121.

It is not a de Polignac number, because 12155943 - 2¹² = 12151847 is a prime.

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 12155943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10203 + ... + 11331.

It is an arithmetic number, because the mean of its divisors is an integer number (1052030).

Almost surely, 2^12155943 is an apocalyptic number.

12155943 is a deficient number, since it is larger than the sum of its proper divisors (4676537).

12155943 is a wasteful number, since it uses less digits than its factorization.

12155943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266.

The product of its digits is 5400, while the sum is 30.

The square root of 12155943 is about 3486.5373940344. The cubic root of 12155943 is about 229.9303065462.

The spelling of 12155943 in words is "twelve million, one hundred fifty-five thousand, nine hundred forty-three".