12025989 has 10 divisors (see below), whose sum is σ = 17964870. Its totient is φ = 8017272.

The previous prime is 12025973. The next prime is 12025991. The reversal of 12025989 is 98952021.

It can be written as a sum of positive squares in only one way, i.e., 9253764 + 2772225 = 3042^2 + 1665^2 .

It is not a de Polignac number, because 12025989 - 2⁴ = 12025973 is a prime.

It is a super-2 number, since 2×12025989² = 289248822856242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225989) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 74154 + ... + 74315.

It is an arithmetic number, because the mean of its divisors is an integer number (1796487).

Almost surely, 2^12025989 is an apocalyptic number.

It is an amenable number.

12025989 is a deficient number, since it is larger than the sum of its proper divisors (5938881).

12025989 is an equidigital number, since it uses as much as digits as its factorization.

12025989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148481 (or 148472 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 12025989 is about 3467.8507753362. The cubic root of 12025989 is about 229.1080069954.

The spelling of 12025989 in words is "twelve million, twenty-five thousand, nine hundred eighty-nine".