2135138 has 4 divisors (see below), whose sum is σ = 3202710. Its totient is φ = 1067568.

The previous prime is 2135117. The next prime is 2135141. The reversal of 2135138 is 8315312.

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., 1682209 + 452929 = 1297^2 + 673^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533783 + ... + 533786.

2^2135138 is an apocalyptic number.

2135138 is a deficient number, since it is larger than the sum of its proper divisors (1067572).

2135138 is a wasteful number, since it uses less digits than its factorization.

2135138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067571.

The product of its digits is 720, while the sum is 23.

The square root of 2135138 is about 1461.2111414850. The cubic root of 2135138 is about 128.7682074354.

The spelling of 2135138 in words is "two million, one hundred thirty-five thousand, one hundred thirty-eight".