7131491 has 4 divisors (see below), whose sum is σ = 7324272. Its totient is φ = 6938712.

The previous prime is 7131469. The next prime is 7131503. The reversal of 7131491 is 1941317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1941317 = 7 ⋅277331.

It is a cyclic number.

It is not a de Polignac number, because 7131491 - 2¹⁴ = 7115107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7131491.

It is not an unprimeable number, because it can be changed into a prime (7131461) 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, 96335 + ... + 96408.

It is an arithmetic number, because the mean of its divisors is an integer number (1831068).

Almost surely, 2^7131491 is an apocalyptic number.

7131491 is a deficient number, since it is larger than the sum of its proper divisors (192781).

7131491 is a wasteful number, since it uses less digits than its factorization.

7131491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192780.

The product of its digits is 756, while the sum is 26.

The square root of 7131491 is about 2670.4851619135. The cubic root of 7131491 is about 192.4834730288.

The spelling of 7131491 in words is "seven million, one hundred thirty-one thousand, four hundred ninety-one".