12351890 has 16 divisors (see below), whose sum is σ = 22599000. Its totient is φ = 4859520.

The previous prime is 12351869. The next prime is 12351901. The reversal of 12351890 is 9815321.

It can be written as a sum of positive squares in 4 ways, for example, as 5121169 + 7230721 = 2263^2 + 2689^2 .

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, 9515 + ... + 10734.

Almost surely, 2^12351890 is an apocalyptic number.

12351890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12351890 is a deficient number, since it is larger than the sum of its proper divisors (10247110).

12351890 is a wasteful number, since it uses less digits than its factorization.

12351890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20317.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12351890 is about 3514.5255725346. The cubic root of 12351890 is about 231.1591764106.

It can be divided in two parts, 1235 and 1890, that added together give a 5-th power (3125 = 5⁵).

The spelling of 12351890 in words is "twelve million, three hundred fifty-one thousand, eight hundred ninety".