2404861 has 4 divisors (see below), whose sum is σ = 2460832. Its totient is φ = 2348892.

The previous prime is 2404859. The next prime is 2404877. The reversal of 2404861 is 1684042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1684042 = 2 ⋅842021.

It is a cyclic number.

It is not a de Polignac number, because 2404861 - 2¹ = 2404859 is a prime.

It is a Duffinian number.

2404861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2404891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27921 + ... + 28006.

It is an arithmetic number, because the mean of its divisors is an integer number (615208).

2^2404861 is an apocalyptic number.

It is an amenable number.

2404861 is a deficient number, since it is larger than the sum of its proper divisors (55971).

2404861 is an equidigital number, since it uses as much as digits as its factorization.

2404861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55970.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 2404861 is about 1550.7614258808. The cubic root of 2404861 is about 133.9769211014.

The spelling of 2404861 in words is "two million, four hundred four thousand, eight hundred sixty-one".