4012138 has 8 divisors (see below), whose sum is σ = 6481188. Its totient is φ = 1851744.

The previous prime is 4012133. The next prime is 4012147. The reversal of 4012138 is 8312104.

It can be written as a sum of positive squares in 2 ways, for example, as 3301489 + 710649 = 1817^2 + 843^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (4012133) 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, 77131 + ... + 77182.

Almost surely, 2^4012138 is an apocalyptic number.

4012138 is a deficient number, since it is larger than the sum of its proper divisors (2469050).

4012138 is a wasteful number, since it uses less digits than its factorization.

4012138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154328.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 4012138 is about 2003.0322014386. The cubic root of 4012138 is about 158.9005086744.

The spelling of 4012138 in words is "four million, twelve thousand, one hundred thirty-eight".