7138157 has 4 divisors (see below), whose sum is σ = 7687260. Its totient is φ = 6589056.

The previous prime is 7138123. The next prime is 7138169. The reversal of 7138157 is 7518317.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2390116 + 4748041 = 1546^2 + 2179^2 .

It is a cyclic number.

It is not a de Polignac number, because 7138157 - 2¹⁴ = 7121773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138177) 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, 274532 + ... + 274557.

It is an arithmetic number, because the mean of its divisors is an integer number (1921815).

Almost surely, 2^7138157 is an apocalyptic number.

It is an amenable number.

7138157 is a deficient number, since it is larger than the sum of its proper divisors (549103).

7138157 is a wasteful number, since it uses less digits than its factorization.

7138157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549102.

The product of its digits is 5880, while the sum is 32.

The square root of 7138157 is about 2671.7329582127. The cubic root of 7138157 is about 192.5434275440.

The spelling of 7138157 in words is "seven million, one hundred thirty-eight thousand, one hundred fifty-seven".