12142783 has 4 divisors (see below), whose sum is σ = 12235608. Its totient is φ = 12049960.

The previous prime is 12142769. The next prime is 12142789. The reversal of 12142783 is 38724121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38724121 = 241 ⋅160681.

It is a cyclic number.

It is not a de Polignac number, because 12142783 - 2¹⁷ = 12011711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46216 + ... + 46477.

It is an arithmetic number, because the mean of its divisors is an integer number (3058902).

Almost surely, 2^12142783 is an apocalyptic number.

12142783 is a deficient number, since it is larger than the sum of its proper divisors (92825).

12142783 is an equidigital number, since it uses as much as digits as its factorization.

12142783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92824.

The product of its digits is 2688, while the sum is 28.

The square root of 12142783 is about 3484.6496237068. The cubic root of 12142783 is about 229.8473025530.

The spelling of 12142783 in words is "twelve million, one hundred forty-two thousand, seven hundred eighty-three".