13785071 has 4 divisors (see below), whose sum is σ = 13873032. Its totient is φ = 13697112.

The previous prime is 13785041. The next prime is 13785091. The reversal of 13785071 is 17058731.

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

It is a cyclic number.

It is not a de Polignac number, because 13785071 - 2²² = 9590767 is a prime.

It is a super-4 number, since 4×13785071⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13785001) 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, 43745 + ... + 44058.

It is an arithmetic number, because the mean of its divisors is an integer number (3468258).

Almost surely, 2^13785071 is an apocalyptic number.

13785071 is a deficient number, since it is larger than the sum of its proper divisors (87961).

13785071 is an equidigital number, since it uses as much as digits as its factorization.

13785071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87960.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 13785071 is about 3712.8252046117. The cubic root of 13785071 is about 239.7745046342.

The spelling of 13785071 in words is "thirteen million, seven hundred eighty-five thousand, seventy-one".