2421870 has 64 divisors (see below), whose sum is σ = 6531840. Its totient is φ = 569600.

The previous prime is 2421847. The next prime is 2421893. The reversal of 2421870 is 781242.

It is an interprime number because it is at equal distance from previous prime (2421847) and next prime (2421893).

It is a self number, because there is not a number n which added to its sum of digits gives 2421870.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13441 + ... + 13619.

It is an arithmetic number, because the mean of its divisors is an integer number (102060).

2^2421870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2421870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3265920).

2421870 is an abundant number, since it is smaller than the sum of its proper divisors (4109970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2421870 is a wasteful number, since it uses less digits than its factorization.

2421870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2421870 is about 1556.2358433091. The cubic root of 2421870 is about 134.2920414575.

It can be divided in two parts, 242 and 1870, that added together give a palindrome (2112).

The spelling of 2421870 in words is "two million, four hundred twenty-one thousand, eight hundred seventy".