4031961 has 4 divisors (see below), whose sum is σ = 5375952. Its totient is φ = 2687972.

The previous prime is 4031947. The next prime is 4031977. The reversal of 4031961 is 1691304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4031961 - 2⁶ = 4031897 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4031561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671991 + ... + 671996.

It is an arithmetic number, because the mean of its divisors is an integer number (1343988).

Almost surely, 2^4031961 is an apocalyptic number.

It is an amenable number.

4031961 is a deficient number, since it is larger than the sum of its proper divisors (1343991).

4031961 is a wasteful number, since it uses less digits than its factorization.

4031961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343990.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 4031961 is about 2007.9743524258. The cubic root of 4031961 is about 159.1617751421.

The spelling of 4031961 in words is "four million, thirty-one thousand, nine hundred sixty-one".