7951138 has 16 divisors (see below), whose sum is σ = 13600440. Its totient is φ = 3453696.

The previous prime is 7951127. The next prime is 7951157. The reversal of 7951138 is 8311597.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7273809 + 677329 = 2697^2 + 823^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8553 + ... + 9436.

Almost surely, 2^7951138 is an apocalyptic number.

7951138 is a deficient number, since it is larger than the sum of its proper divisors (5649302).

7951138 is a wasteful number, since it uses less digits than its factorization.

7951138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18021.

The product of its digits is 7560, while the sum is 34.

The square root of 7951138 is about 2819.7762322567. The cubic root of 7951138 is about 199.5919848509.

The spelling of 7951138 in words is "seven million, nine hundred fifty-one thousand, one hundred thirty-eight".