2187434 has 4 divisors (see below), whose sum is σ = 3281154. Its totient is φ = 1093716.

The previous prime is 2187421. The next prime is 2187457. The reversal of 2187434 is 4347812.

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

It can be written as a sum of positive squares in only one way, i.e., 2146225 + 41209 = 1465^2 + 203^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2187397 and 2187406.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 546857 + ... + 546860.

2^2187434 is an apocalyptic number.

2187434 is a deficient number, since it is larger than the sum of its proper divisors (1093720).

2187434 is a wasteful number, since it uses less digits than its factorization.

2187434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093719.

The product of its digits is 5376, while the sum is 29.

The square root of 2187434 is about 1478.9976335343. The cubic root of 2187434 is about 129.8110469918.

The spelling of 2187434 in words is "two million, one hundred eighty-seven thousand, four hundred thirty-four".