3959961 has 8 divisors (see below), whose sum is σ = 5557920. Its totient is φ = 2500992.

The previous prime is 3959959. The next prime is 3959981. The reversal of 3959961 is 1699593.

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

It is not a de Polignac number, because 3959961 - 2¹ = 3959959 is a prime.

It is a super-2 number, since 2×3959961² = 31362582243042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3959911) 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, 34680 + ... + 34793.

It is an arithmetic number, because the mean of its divisors is an integer number (694740).

Almost surely, 2^3959961 is an apocalyptic number.

It is an amenable number.

3959961 is a deficient number, since it is larger than the sum of its proper divisors (1597959).

3959961 is a wasteful number, since it uses less digits than its factorization.

3959961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69495.

The product of its digits is 65610, while the sum is 42.

The square root of 3959961 is about 1989.9650750704. The cubic root of 3959961 is about 158.2086784940.

The spelling of 3959961 in words is "three million, nine hundred fifty-nine thousand, nine hundred sixty-one".