2401645 has 4 divisors (see below), whose sum is σ = 2881980. Its totient is φ = 1921312.

The previous prime is 2401639. The next prime is 2401667. The reversal of 2401645 is 5461042.

2401645 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, and also an emirpimes, since its reverse is a distinct semiprime: 5461042 = 2 ⋅2730521.

It can be written as a sum of positive squares in 2 ways, for example, as 1142761 + 1258884 = 1069^2 + 1122^2 .

It is a cyclic number.

It is not a de Polignac number, because 2401645 - 2⁷ = 2401517 is a prime.

It is a super-3 number, since 3×2401645³ = 41557335263494233375, which contains 333 as substring.

It is a plaindrome in base 8.

It is a zygodrome in base 8.

It is a congruent number.

It is an unprimeable number.

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, 240160 + ... + 240169.

It is an arithmetic number, because the mean of its divisors is an integer number (720495).

2^2401645 is an apocalyptic number.

It is an amenable number.

2401645 is a deficient number, since it is larger than the sum of its proper divisors (480335).

2401645 is an equidigital number, since it uses as much as digits as its factorization.

2401645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480334.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2401645 is about 1549.7241690056. The cubic root of 2401645 is about 133.9171723970.

Adding to 2401645 its reverse (5461042), we get a palindrome (7862687).

The spelling of 2401645 in words is "two million, four hundred one thousand, six hundred forty-five".