8042138 has 8 divisors (see below), whose sum is σ = 12991188. Its totient is φ = 3711744.

The previous prime is 8042101. The next prime is 8042147. The reversal of 8042138 is 8312408.

It can be written as a sum of positive squares in 2 ways, for example, as 6017209 + 2024929 = 2453^2 + 1423^2 .

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

It is a super-2 number, since 2×8042138² = 129351967222088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 309313 = 8042138 / (8 + 0 + 4 + 2 + 1 + 3 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154631 + ... + 154682.

Almost surely, 2^8042138 is an apocalyptic number.

8042138 is a deficient number, since it is larger than the sum of its proper divisors (4949050).

8042138 is a wasteful number, since it uses less digits than its factorization.

8042138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309328.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 8042138 is about 2835.8663579231. The cubic root of 8042138 is about 200.3505352662.

The spelling of 8042138 in words is "eight million, forty-two thousand, one hundred thirty-eight".