7901138 has 8 divisors (see below), whose sum is σ = 13544832. Its totient is φ = 3386196.

The previous prime is 7901119. The next prime is 7901149. The reversal of 7901138 is 8311097.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7901138.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282170 + ... + 282197.

It is an arithmetic number, because the mean of its divisors is an integer number (1693104).

Almost surely, 2^7901138 is an apocalyptic number.

7901138 is a deficient number, since it is larger than the sum of its proper divisors (5643694).

7901138 is a wasteful number, since it uses less digits than its factorization.

7901138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564376.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 7901138 is about 2810.8962983362. The cubic root of 7901138 is about 199.1727328634.

The spelling of 7901138 in words is "seven million, nine hundred one thousand, one hundred thirty-eight".