2423981 has 16 divisors (see below), whose sum is σ = 2918400. Its totient is φ = 2010960.

The previous prime is 2423969. The next prime is 2423999. The reversal of 2423981 is 1893242.

It is not a de Polignac number, because 2423981 - 2⁶ = 2423917 is a prime.

It is a super-2 number, since 2×2423981² = 11751367776722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2423951) 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 15 ways as a sum of consecutive naturals, for example, 12596 + ... + 12786.

It is an arithmetic number, because the mean of its divisors is an integer number (182400).

2^2423981 is an apocalyptic number.

It is an amenable number.

2423981 is a deficient number, since it is larger than the sum of its proper divisors (494419).

2423981 is an equidigital number, since it uses as much as digits as its factorization.

2423981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 235 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 2423981 is about 1556.9139346798. The cubic root of 2423981 is about 134.3310482542.

The spelling of 2423981 in words is "two million, four hundred twenty-three thousand, nine hundred eighty-one".