12124890 has 40 divisors (see below), whose sum is σ = 32604660. Its totient is φ = 3233088.

The previous prime is 12124867. The next prime is 12124891. The reversal of 12124890 is 9842121.

It can be written as a sum of positive squares in 2 ways, for example, as 9865881 + 2259009 = 3141^2 + 1503^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12124891) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 6675 + ... + 8294.

Almost surely, 2^12124890 is an apocalyptic number.

12124890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12124890 is an abundant number, since it is smaller than the sum of its proper divisors (20479770).

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

12124890 is a wasteful number, since it uses less digits than its factorization.

12124890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14988 (or 14979 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 12124890 is about 3482.0812741807. The cubic root of 12124890 is about 229.7343498768.

It can be divided in two parts, 1 and 2124890, that added together give a triangular number (2124891 = T₂₀₆₁).

The spelling of 12124890 in words is "twelve million, one hundred twenty-four thousand, eight hundred ninety".