2415981 has 4 divisors (see below), whose sum is σ = 3221312. Its totient is φ = 1610652.

The previous prime is 2415947. The next prime is 2415997. The reversal of 2415981 is 1895142.

It is a happy number.

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.

It is not a de Polignac number, because 2415981 - 2¹¹ = 2413933 is a prime.

It is a super-2 number, since 2×2415981² = 11673928384722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2413981) 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, 402661 + ... + 402666.

It is an arithmetic number, because the mean of its divisors is an integer number (805328).

2^2415981 is an apocalyptic number.

It is an amenable number.

2415981 is a deficient number, since it is larger than the sum of its proper divisors (805331).

2415981 is an equidigital number, since it uses as much as digits as its factorization.

2415981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805330.

The product of its digits is 2880, while the sum is 30.

The square root of 2415981 is about 1554.3426263215. The cubic root of 2415981 is about 134.1831052905.

The spelling of 2415981 in words is "two million, four hundred fifteen thousand, nine hundred eighty-one".