2391601 has 4 divisors (see below), whose sum is σ = 2474100. Its totient is φ = 2309104.

The previous prime is 2391589. The next prime is 2391629. The reversal of 2391601 is 1061932.

2391601 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 + 389376 = 1415^2 + 624^2 .

It is a cyclic number.

It is not a de Polignac number, because 2391601 - 2⁹ = 2391089 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391671) 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, 41206 + ... + 41263.

It is an arithmetic number, because the mean of its divisors is an integer number (618525).

2^2391601 is an apocalyptic number.

It is an amenable number.

2391601 is a deficient number, since it is larger than the sum of its proper divisors (82499).

2391601 is an equidigital number, since it uses as much as digits as its factorization.

2391601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82498.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2391601 is about 1546.4801970927. The cubic root of 2391601 is about 133.7302250439.

It can be divided in two parts, 2391 and 601, that added together give a palindrome (2992).

The spelling of 2391601 in words is "two million, three hundred ninety-one thousand, six hundred one".