7131487 has 4 divisors (see below), whose sum is σ = 7779816. Its totient is φ = 6483160.

The previous prime is 7131469. The next prime is 7131503. The reversal of 7131487 is 7841317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7841317 = 11 ⋅712847.

It is a cyclic number.

It is not a de Polignac number, because 7131487 - 2⁷ = 7131359 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7131407) 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, 324148 + ... + 324169.

It is an arithmetic number, because the mean of its divisors is an integer number (1944954).

Almost surely, 2^7131487 is an apocalyptic number.

7131487 is a deficient number, since it is larger than the sum of its proper divisors (648329).

7131487 is a wasteful number, since it uses less digits than its factorization.

7131487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648328.

The product of its digits is 4704, while the sum is 31.

The square root of 7131487 is about 2670.4844129858. The cubic root of 7131487 is about 192.4834370412.

The spelling of 7131487 in words is "seven million, one hundred thirty-one thousand, four hundred eighty-seven".