3997506 has 16 divisors (see below), whose sum is σ = 8026848. Its totient is φ = 1327200.

The previous prime is 3997493. The next prime is 3997507. The reversal of 3997506 is 6057993.

It is not an unprimeable number, because it can be changed into a prime (3997507) 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, 501 + ... + 2871.

It is an arithmetic number, because the mean of its divisors is an integer number (501678).

Almost surely, 2^3997506 is an apocalyptic number.

3997506 is an abundant number, since it is smaller than the sum of its proper divisors (4029342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3997506 is a wasteful number, since it uses less digits than its factorization.

3997506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 3997506 is about 1999.3764027816. The cubic root of 3997506 is about 158.7071068525.

The spelling of 3997506 in words is "three million, nine hundred ninety-seven thousand, five hundred six".