2187420 has 24 divisors (see below), whose sum is σ = 6124944. Its totient is φ = 583296.

The previous prime is 2187397. The next prime is 2187421. The reversal of 2187420 is 247812.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18169 + ... + 18288.

It is an arithmetic number, because the mean of its divisors is an integer number (255206).

2^2187420 is an apocalyptic number.

2187420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187420 is an abundant number, since it is smaller than the sum of its proper divisors (3937524).

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

2187420 is a wasteful number, since it uses less digits than its factorization.

2187420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36469 (or 36467 counting only the distinct ones).

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

The square root of 2187420 is about 1478.9929005915. The cubic root of 2187420 is about 129.8107700526.

The spelling of 2187420 in words is "two million, one hundred eighty-seven thousand, four hundred twenty".