3985257 has 8 divisors (see below), whose sum is σ = 5341984. Its totient is φ = 2642688.

The previous prime is 3985249. The next prime is 3985277. The reversal of 3985257 is 7525893.

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

It is not a de Polignac number, because 3985257 - 2³ = 3985249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3985207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2863 + ... + 4020.

It is an arithmetic number, because the mean of its divisors is an integer number (667748).

Almost surely, 2^3985257 is an apocalyptic number.

It is an amenable number.

3985257 is a deficient number, since it is larger than the sum of its proper divisors (1356727).

3985257 is a wasteful number, since it uses less digits than its factorization.

3985257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7079.

The product of its digits is 75600, while the sum is 39.

The square root of 3985257 is about 1996.3108475385. The cubic root of 3985257 is about 158.5448396524.

The spelling of 3985257 in words is "three million, nine hundred eighty-five thousand, two hundred fifty-seven".