4311961 has 4 divisors (see below), whose sum is σ = 4360500. Its totient is φ = 4263424.

The previous prime is 4311959. The next prime is 4311977. The reversal of 4311961 is 1691134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1691134 = 2 ⋅845567.

It can be written as a sum of positive squares in 2 ways, for example, as 2975625 + 1336336 = 1725^2 + 1156^2 .

It is a cyclic number.

It is not a de Polignac number, because 4311961 - 2¹ = 4311959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4311361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24136 + ... + 24313.

It is an arithmetic number, because the mean of its divisors is an integer number (1090125).

Almost surely, 2^4311961 is an apocalyptic number.

It is an amenable number.

4311961 is a deficient number, since it is larger than the sum of its proper divisors (48539).

4311961 is an equidigital number, since it uses as much as digits as its factorization.

4311961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48538.

The product of its digits is 648, while the sum is 25.

The square root of 4311961 is about 2076.5261857246. The cubic root of 4311961 is about 162.7639701773.

The spelling of 4311961 in words is "four million, three hundred eleven thousand, nine hundred sixty-one".