7138487 has 8 divisors (see below), whose sum is σ = 7887456. Its totient is φ = 6426112.

The previous prime is 7138409. The next prime is 7138489. The reversal of 7138487 is 7848317.

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

It is a cyclic number.

It is not a de Polignac number, because 7138487 - 2¹⁰ = 7137463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7138487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7138489) 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, 8738 + ... + 9519.

It is an arithmetic number, because the mean of its divisors is an integer number (985932).

Almost surely, 2^7138487 is an apocalyptic number.

7138487 is a deficient number, since it is larger than the sum of its proper divisors (748969).

7138487 is a wasteful number, since it uses less digits than its factorization.

7138487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18297.

The product of its digits is 37632, while the sum is 38.

The square root of 7138487 is about 2671.7947151681. The cubic root of 7138487 is about 192.5463946195.

The spelling of 7138487 in words is "seven million, one hundred thirty-eight thousand, four hundred eighty-seven".