12142089 has 16 divisors (see below), whose sum is σ = 18135040. Its totient is φ = 8028720.

The previous prime is 12142079. The next prime is 12142093. The reversal of 12142089 is 98024121.

It is not a de Polignac number, because 12142089 - 2⁵ = 12142057 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12142019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1659 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (1133440).

Almost surely, 2^12142089 is an apocalyptic number.

It is an amenable number.

12142089 is a deficient number, since it is larger than the sum of its proper divisors (5992951).

12142089 is a wasteful number, since it uses less digits than its factorization.

12142089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677 (or 3671 counting only the distinct ones).

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

The square root of 12142089 is about 3484.5500426884. The cubic root of 12142089 is about 229.8429236264.

The spelling of 12142089 in words is "twelve million, one hundred forty-two thousand, eighty-nine".