12840235 has 8 divisors (see below), whose sum is σ = 15428016. Its totient is φ = 10259040.

The previous prime is 12840211. The next prime is 12840241. The reversal of 12840235 is 53204821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12840235 - 2⁵ = 12840203 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5380 + ... + 7390.

It is an arithmetic number, because the mean of its divisors is an integer number (1928502).

Almost surely, 2^12840235 is an apocalyptic number.

12840235 is a deficient number, since it is larger than the sum of its proper divisors (2587781).

12840235 is a wasteful number, since it uses less digits than its factorization.

12840235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 12840235 is about 3583.3273643361. The cubic root of 12840235 is about 234.1662623876.

The spelling of 12840235 in words is "twelve million, eight hundred forty thousand, two hundred thirty-five".