2187236 has 18 divisors (see below), whose sum is σ = 3962070. Its totient is φ = 1056480.

The previous prime is 2187233. The next prime is 2187247. The reversal of 2187236 is 6327812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1537600 + 649636 = 1240^2 + 806^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2187199 and 2187208.

It is not an unprimeable number, because it can be changed into a prime (2187233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3560 + ... + 4128.

It is an arithmetic number, because the mean of its divisors is an integer number (220115).

2^2187236 is an apocalyptic number.

It is an amenable number.

2187236 is a deficient number, since it is larger than the sum of its proper divisors (1774834).

2187236 is a wasteful number, since it uses less digits than its factorization.

2187236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 602 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 2187236 is about 1478.9306947927. The cubic root of 2187236 is about 129.8071301707.

The spelling of 2187236 in words is "two million, one hundred eighty-seven thousand, two hundred thirty-six".