4391961 has 16 divisors (see below), whose sum is σ = 6857088. Its totient is φ = 2448000.

The previous prime is 4391957. The next prime is 4391969. The reversal of 4391961 is 1691934.

It is not a de Polignac number, because 4391961 - 2² = 4391957 is a prime.

4391961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4391969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1690 + ... + 3411.

It is an arithmetic number, because the mean of its divisors is an integer number (428568).

Almost surely, 2^4391961 is an apocalyptic number.

4391961 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4391961 is a deficient number, since it is larger than the sum of its proper divisors (2465127).

4391961 is a wasteful number, since it uses less digits than its factorization.

4391961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152.

The product of its digits is 5832, while the sum is 33.

The square root of 4391961 is about 2095.7005988452. The cubic root of 4391961 is about 163.7643974677.

The spelling of 4391961 in words is "four million, three hundred ninety-one thousand, nine hundred sixty-one".