4312661 has 4 divisors (see below), whose sum is σ = 4500192. Its totient is φ = 4125132.

The previous prime is 4312657. The next prime is 4312691. The reversal of 4312661 is 1662134.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1662134 = 2 ⋅831067.

It is a cyclic number.

It is not a de Polignac number, because 4312661 - 2² = 4312657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 187507 = 4312661 / (4 + 3 + 1 + 2 + 6 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4312631) 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, 93731 + ... + 93776.

It is an arithmetic number, because the mean of its divisors is an integer number (1125048).

Almost surely, 2^4312661 is an apocalyptic number.

It is an amenable number.

4312661 is a deficient number, since it is larger than the sum of its proper divisors (187531).

4312661 is a wasteful number, since it uses less digits than its factorization.

4312661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187530.

The product of its digits is 864, while the sum is 23.

The square root of 4312661 is about 2076.6947296124. The cubic root of 4312661 is about 162.7727773545.

Adding to 4312661 its reverse (1662134), we get a palindrome (5974795).

The spelling of 4312661 in words is "four million, three hundred twelve thousand, six hundred sixty-one".