2142387 has 12 divisors (see below), whose sum is σ = 3332784. Its totient is φ = 1318320.

The previous prime is 2142377. The next prime is 2142397. The reversal of 2142387 is 7832412.

It is an interprime number because it is at equal distance from previous prime (2142377) and next prime (2142397).

It is not a de Polignac number, because 2142387 - 2¹² = 2138291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2142387.

It is not an unprimeable number, because it can be changed into a prime (2142377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9039 + ... + 9272.

It is an arithmetic number, because the mean of its divisors is an integer number (277732).

2^2142387 is an apocalyptic number.

2142387 is a deficient number, since it is larger than the sum of its proper divisors (1190397).

2142387 is a wasteful number, since it uses less digits than its factorization.

2142387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18330 (or 18327 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2142387 is about 1463.6895162568. The cubic root of 2142387 is about 128.9137696660.

Adding to 2142387 its reverse (7832412), we get a palindrome (9974799).

It can be divided in two parts, 214 and 2387, that added together give a square (2601 = 51²).

The spelling of 2142387 in words is "two million, one hundred forty-two thousand, three hundred eighty-seven".