2187429 has 4 divisors (see below), whose sum is σ = 2916576. Its totient is φ = 1458284.

The previous prime is 2187421. The next prime is 2187457. The reversal of 2187429 is 9247812.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2187429 - 2³ = 2187421 is a prime.

It is a D-number.

2187429 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2187429.

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 3 ways as a sum of consecutive naturals, for example, 364569 + ... + 364574.

It is an arithmetic number, because the mean of its divisors is an integer number (729144).

2^2187429 is an apocalyptic number.

It is an amenable number.

2187429 is a deficient number, since it is larger than the sum of its proper divisors (729147).

2187429 is an equidigital number, since it uses as much as digits as its factorization.

2187429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729146.

The product of its digits is 8064, while the sum is 33.

The square root of 2187429 is about 1478.9959431993. The cubic root of 2187429 is about 129.8109480851.

The spelling of 2187429 in words is "two million, one hundred eighty-seven thousand, four hundred twenty-nine".