12271090 has 48 divisors (see below), whose sum is σ = 24546888. Its totient is φ = 4412928.

The previous prime is 12271079. The next prime is 12271099. The reversal of 12271090 is 9017221.

It can be written as a sum of positive squares in 12 ways, for example, as 97969 + 12173121 = 313^2 + 3489^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12271099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89502 + ... + 89638.

Almost surely, 2^12271090 is an apocalyptic number.

12271090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12271090 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

12271090 is a wasteful number, since it uses less digits than its factorization.

12271090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 12271090 is about 3503.0115614996. The cubic root of 12271090 is about 230.6540300509.

It can be divided in two parts, 1227 and 1090, that multiplied together give a triangular number (1337430 = T₁₆₃₅).

The spelling of 12271090 in words is "twelve million, two hundred seventy-one thousand, ninety".