2400641 has 4 divisors (see below), whose sum is σ = 2408532. Its totient is φ = 2392752.

The previous prime is 2400623. The next prime is 2400661. The reversal of 2400641 is 1460042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1460042 = 2 ⋅730021.

It can be written as a sum of positive squares in 2 ways, for example, as 1430416 + 970225 = 1196^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400641 - 2⁶ = 2400577 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2400661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3470 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (602133).

2^2400641 is an apocalyptic number.

It is an amenable number.

2400641 is a deficient number, since it is larger than the sum of its proper divisors (7891).

2400641 is an equidigital number, since it uses as much as digits as its factorization.

2400641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7890.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2400641 is about 1549.4002065315. The cubic root of 2400641 is about 133.8985085810.

Adding to 2400641 its reverse (1460042), we get a palindrome (3860683).

The spelling of 2400641 in words is "two million, four hundred thousand, six hundred forty-one".