2145587 has 4 divisors (see below), whose sum is σ = 2271816. Its totient is φ = 2019360.

The previous prime is 2145551. The next prime is 2145617. The reversal of 2145587 is 7855412.

2145587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2145587 - 2⁸ = 2145331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63089 + ... + 63122.

It is an arithmetic number, because the mean of its divisors is an integer number (567954).

2^2145587 is an apocalyptic number.

2145587 is a deficient number, since it is larger than the sum of its proper divisors (126229).

2145587 is a wasteful number, since it uses less digits than its factorization.

2145587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126228.

The product of its digits is 11200, while the sum is 32.

The square root of 2145587 is about 1464.7822363751. The cubic root of 2145587 is about 128.9779222278.

The spelling of 2145587 in words is "two million, one hundred forty-five thousand, five hundred eighty-seven".