4009961 has 8 divisors (see below), whose sum is σ = 4097280. Its totient is φ = 3923712.

The previous prime is 4009939. The next prime is 4009991. The reversal of 4009961 is 1699004.

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

It is a cyclic number.

It is not a de Polignac number, because 4009961 - 2⁶ = 4009897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4009921) 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, 15116 + ... + 15378.

It is an arithmetic number, because the mean of its divisors is an integer number (512160).

Almost surely, 2^4009961 is an apocalyptic number.

It is an amenable number.

4009961 is a deficient number, since it is larger than the sum of its proper divisors (87319).

4009961 is a wasteful number, since it uses less digits than its factorization.

4009961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 4009961 is about 2002.4887015911. The cubic root of 4009961 is about 158.8717634855.

The spelling of 4009961 in words is "four million, nine thousand, nine hundred sixty-one".