7131427 has 4 divisors (see below), whose sum is σ = 7139376. Its totient is φ = 7123480.

The previous prime is 7131407. The next prime is 7131433. The reversal of 7131427 is 7241317.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7131427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7131407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2428 + ... + 4489.

It is an arithmetic number, because the mean of its divisors is an integer number (1784844).

Almost surely, 2^7131427 is an apocalyptic number.

7131427 is a deficient number, since it is larger than the sum of its proper divisors (7949).

7131427 is a wasteful number, since it uses less digits than its factorization.

7131427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7948.

The product of its digits is 1176, while the sum is 25.

The square root of 7131427 is about 2670.4731790452. The cubic root of 7131427 is about 192.4828972268.

It can be divided in two parts, 713142 and 7, that multiplied together give a palindrome (4991994).

The spelling of 7131427 in words is "seven million, one hundred thirty-one thousand, four hundred twenty-seven".