7138491 has 8 divisors (see below), whose sum is σ = 9568080. Its totient is φ = 4733952.

The previous prime is 7138489. The next prime is 7138513. The reversal of 7138491 is 1948317.

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

It is not a de Polignac number, because 7138491 - 2¹ = 7138489 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

7138491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7136491) 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, 5586 + ... + 6743.

It is an arithmetic number, because the mean of its divisors is an integer number (1196010).

Almost surely, 2^7138491 is an apocalyptic number.

7138491 is a deficient number, since it is larger than the sum of its proper divisors (2429589).

7138491 is a wasteful number, since it uses less digits than its factorization.

7138491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12525.

The product of its digits is 6048, while the sum is 33.

The square root of 7138491 is about 2671.7954637285. The cubic root of 7138491 is about 192.5464305835.

The spelling of 7138491 in words is "seven million, one hundred thirty-eight thousand, four hundred ninety-one".