2301861 has 4 divisors (see below), whose sum is σ = 3069152. Its totient is φ = 1534572.

The previous prime is 2301857. The next prime is 2301877. The reversal of 2301861 is 1681032.

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 not a de Polignac number, because 2301861 - 2² = 2301857 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

2301861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2301811) 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, 383641 + ... + 383646.

It is an arithmetic number, because the mean of its divisors is an integer number (767288).

2^2301861 is an apocalyptic number.

It is an amenable number.

2301861 is a deficient number, since it is larger than the sum of its proper divisors (767291).

2301861 is an equidigital number, since it uses as much as digits as its factorization.

2301861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767290.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2301861 is about 1517.1885182798. The cubic root of 2301861 is about 132.0362044860.

Adding to 2301861 its reverse (1681032), we get a palindrome (3982893).

The spelling of 2301861 in words is "two million, three hundred one thousand, eight hundred sixty-one".