3981507 has 16 divisors (see below), whose sum is σ = 5832960. Its totient is φ = 2404512.

The previous prime is 3981503. The next prime is 3981517. The reversal of 3981507 is 7051893.

It is not a de Polignac number, because 3981507 - 2² = 3981503 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (3981503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208 + ... + 2829.

It is an arithmetic number, because the mean of its divisors is an integer number (364560).

Almost surely, 2^3981507 is an apocalyptic number.

3981507 is a deficient number, since it is larger than the sum of its proper divisors (1851453).

3981507 is a wasteful number, since it uses less digits than its factorization.

3981507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 3981507 is about 1995.3713940016. The cubic root of 3981507 is about 158.4950954972.

The spelling of 3981507 in words is "three million, nine hundred eighty-one thousand, five hundred seven".