40785123 has 4 divisors (see below), whose sum is σ = 54380168. Its totient is φ = 27190080.

The previous prime is 40785103. The next prime is 40785167. The reversal of 40785123 is 32158704.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40785123 - 2²⁰ = 39736547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40785103) 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, 6797518 + ... + 6797523.

It is an arithmetic number, because the mean of its divisors is an integer number (13595042).

Almost surely, 2^40785123 is an apocalyptic number.

40785123 is a deficient number, since it is larger than the sum of its proper divisors (13595045).

40785123 is a wasteful number, since it uses less digits than its factorization.

40785123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13595044.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 40785123 is about 6386.3231205444. The cubic root of 40785123 is about 344.2182762655.

The spelling of 40785123 in words is "forty million, seven hundred eighty-five thousand, one hundred twenty-three".