12120890 has 16 divisors (see below), whose sum is σ = 21899808. Its totient is φ = 4830096.

The previous prime is 12120863. The next prime is 12120919. The reversal of 12120890 is 9802121.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (1368738).

Almost surely, 2^12120890 is an apocalyptic number.

12120890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12120890 is a deficient number, since it is larger than the sum of its proper divisors (9778918).

12120890 is a wasteful number, since it uses less digits than its factorization.

12120890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 12120890 is about 3481.5068576695. The cubic root of 12120890 is about 229.7090839852.

The spelling of 12120890 in words is "twelve million, one hundred twenty thousand, eight hundred ninety".