3947535 has 48 divisors (see below), whose sum is σ = 7498080. Its totient is φ = 1994544.

The previous prime is 3947533. The next prime is 3947549. The reversal of 3947535 is 5357493.

It is not a de Polignac number, because 3947535 - 2¹ = 3947533 is a prime.

Its product of digits (56700) is a multiple of the sum of its prime divisors (27).

It is a zygodrome in base 2 and base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 3947535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947533) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207756 + ... + 207774.

It is an arithmetic number, because the mean of its divisors is an integer number (156210).

Almost surely, 2^3947535 is an apocalyptic number.

3947535 is a deficient number, since it is larger than the sum of its proper divisors (3550545).

3947535 is an frugal number, since it uses more digits than its factorization.

3947535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 27 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 3947535 is about 1986.8404566044. The cubic root of 3947535 is about 158.0430235877.

It can be divided in two parts, 39 and 47535, that added together give a palindrome (47574).

The spelling of 3947535 in words is "three million, nine hundred forty-seven thousand, five hundred thirty-five".