7942138 has 8 divisors (see below), whose sum is σ = 12297600. Its totient is φ = 3842940.

The previous prime is 7942117. The next prime is 7942163. The reversal of 7942138 is 8312497.

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

It is a super-2 number, since 2×7942138² = 126155112022088, which contains 22 as substring.

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, 63988 + ... + 64111.

It is an arithmetic number, because the mean of its divisors is an integer number (1537200).

Almost surely, 2^7942138 is an apocalyptic number.

7942138 is a deficient number, since it is larger than the sum of its proper divisors (4355462).

7942138 is a wasteful number, since it uses less digits than its factorization.

7942138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128132.

The product of its digits is 12096, while the sum is 34.

The square root of 7942138 is about 2818.1799090903. The cubic root of 7942138 is about 199.5166494690.

The spelling of 7942138 in words is "seven million, nine hundred forty-two thousand, one hundred thirty-eight".