2123361 has 8 divisors (see below), whose sum is σ = 3145760. Its totient is φ = 1415556.

The previous prime is 2123357. The next prime is 2123369. The reversal of 2123361 is 1633212.

2123361 = 24² + 25² + ... + 185².

It is not a de Polignac number, because 2123361 - 2² = 2123357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39295 + ... + 39348.

It is an arithmetic number, because the mean of its divisors is an integer number (393220).

2^2123361 is an apocalyptic number.

It is an amenable number.

2123361 is a deficient number, since it is larger than the sum of its proper divisors (1022399).

2123361 is an equidigital number, since it uses as much as digits as its factorization.

2123361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78652 (or 78646 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2123361 is about 1457.1756929073. The cubic root of 2123361 is about 128.5310174585.

Adding to 2123361 its reverse (1633212), we get a palindrome (3756573).

The spelling of 2123361 in words is "two million, one hundred twenty-three thousand, three hundred sixty-one".