7138815 has 8 divisors (see below), whose sum is σ = 11422128. Its totient is φ = 3807360.

The previous prime is 7138811. The next prime is 7138819. The reversal of 7138815 is 5188317.

It is an interprime number because it is at equal distance from previous prime (7138811) and next prime (7138819).

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

It is not a de Polignac number, because 7138815 - 2² = 7138811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237946 + ... + 237975.

It is an arithmetic number, because the mean of its divisors is an integer number (1427766).

Almost surely, 2^7138815 is an apocalyptic number.

7138815 is a deficient number, since it is larger than the sum of its proper divisors (4283313).

7138815 is a wasteful number, since it uses less digits than its factorization.

7138815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475929.

The product of its digits is 6720, while the sum is 33.

The square root of 7138815 is about 2671.8560964244. The cubic root of 7138815 is about 192.5493436221.

The spelling of 7138815 in words is "seven million, one hundred thirty-eight thousand, eight hundred fifteen".