12155434 has 16 divisors (see below), whose sum is σ = 18781056. Its totient is φ = 5896800.

The previous prime is 12155419. The next prime is 12155447. The reversal of 12155434 is 43455121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12155399 and 12155408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21949 + ... + 22495.

It is an arithmetic number, because the mean of its divisors is an integer number (1173816).

Almost surely, 2^12155434 is an apocalyptic number.

12155434 is a deficient number, since it is larger than the sum of its proper divisors (6625622).

12155434 is a wasteful number, since it uses less digits than its factorization.

12155434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its digits is 2400, while the sum is 25.

The square root of 12155434 is about 3486.4643982120. The cubic root of 12155434 is about 229.9270972474.

It can be divided in two parts, 121 and 55434, that added together give a palindrome (55555).

The spelling of 12155434 in words is "twelve million, one hundred fifty-five thousand, four hundred thirty-four".