2459681 has 4 divisors (see below), whose sum is σ = 2811072. Its totient is φ = 2108292.

The previous prime is 2459663. The next prime is 2459701. The reversal of 2459681 is 1869542.

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: 1869542 = 2 ⋅934771.

It is a cyclic number.

It is not a de Polignac number, because 2459681 - 2⁶ = 2459617 is a prime.

It is a super-2 number, since 2×2459681² = 12100061243522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2459621) 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, 175685 + ... + 175698.

It is an arithmetic number, because the mean of its divisors is an integer number (702768).

2^2459681 is an apocalyptic number.

It is an amenable number.

2459681 is a deficient number, since it is larger than the sum of its proper divisors (351391).

2459681 is an equidigital number, since it uses as much as digits as its factorization.

2459681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351390.

The product of its digits is 17280, while the sum is 35.

The square root of 2459681 is about 1568.3370173531. The cubic root of 2459681 is about 134.9873056193.

The spelling of 2459681 in words is "two million, four hundred fifty-nine thousand, six hundred eighty-one".