12120408 has 32 divisors (see below), whose sum is σ = 33668400. Its totient is φ = 4040064.

The previous prime is 12120403. The next prime is 12120419. The reversal of 12120408 is 80402121.

12120408 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27841 + ... + 28272.

Almost surely, 2^12120408 is an apocalyptic number.

12120408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12120408 is an abundant number, since it is smaller than the sum of its proper divisors (21547992).

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

12120408 is a wasteful number, since it uses less digits than its factorization.

12120408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56128 (or 56118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 12120408 is about 3481.4376340816. The cubic root of 12120408 is about 229.7060390700.

Adding to 12120408 its sum of digits (18), we get a triangular number (12120426 = T₄₉₂₃).

Adding to 12120408 its reverse (80402121), we get a palindrome (92522529).

The spelling of 12120408 in words is "twelve million, one hundred twenty thousand, four hundred eight".