2427921 has 8 divisors (see below), whose sum is σ = 3596960. Its totient is φ = 1618596.

The previous prime is 2427911. The next prime is 2427947. The reversal of 2427921 is 1297242.

It is a de Polignac number, because none of the positive numbers 2^k-2427921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 89923 = 2427921 / (2 + 4 + 2 + 7 + 9 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2427911) 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 7 ways as a sum of consecutive naturals, for example, 44935 + ... + 44988.

It is an arithmetic number, because the mean of its divisors is an integer number (449620).

2^2427921 is an apocalyptic number.

It is an amenable number.

2427921 is a deficient number, since it is larger than the sum of its proper divisors (1169039).

2427921 is an equidigital number, since it uses as much as digits as its factorization.

2427921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89932 (or 89926 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 2427921 is about 1558.1787445605. The cubic root of 2427921 is about 134.4037905500.

The spelling of 2427921 in words is "two million, four hundred twenty-seven thousand, nine hundred twenty-one".