2345621 has 4 divisors (see below), whose sum is σ = 2389932. Its totient is φ = 2301312.

The previous prime is 2345617. The next prime is 2345641. The reversal of 2345621 is 1265432.

2345621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2002225 + 343396 = 1415^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2345621 - 2² = 2345617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2345641) 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, 22076 + ... + 22181.

It is an arithmetic number, because the mean of its divisors is an integer number (597483).

2^2345621 is an apocalyptic number.

It is an amenable number.

2345621 is a deficient number, since it is larger than the sum of its proper divisors (44311).

2345621 is an equidigital number, since it uses as much as digits as its factorization.

2345621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44310.

The product of its digits is 1440, while the sum is 23.

The square root of 2345621 is about 1531.5420333768. The cubic root of 2345621 is about 132.8676581319.

The spelling of 2345621 in words is "two million, three hundred forty-five thousand, six hundred twenty-one".