4661861 has 4 divisors (see below), whose sum is σ = 4718112. Its totient is φ = 4605612.

The previous prime is 4661851. The next prime is 4661863. The reversal of 4661861 is 1681664.

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.

It is a cyclic number.

It is not a de Polignac number, because 4661861 - 2¹⁴ = 4645477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4661863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28001 + ... + 28166.

It is an arithmetic number, because the mean of its divisors is an integer number (1179528).

Almost surely, 2^4661861 is an apocalyptic number.

It is an amenable number.

4661861 is a deficient number, since it is larger than the sum of its proper divisors (56251).

4661861 is an equidigital number, since it uses as much as digits as its factorization.

4661861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56250.

The product of its digits is 6912, while the sum is 32.

The square root of 4661861 is about 2159.1343172670. The cubic root of 4661861 is about 167.0525489906.

The spelling of 4661861 in words is "four million, six hundred sixty-one thousand, eight hundred sixty-one".