7131945 has 16 divisors (see below), whose sum is σ = 11627712. Its totient is φ = 3731520.

The previous prime is 7131923. The next prime is 7131947. The reversal of 7131945 is 5491317.

7131945 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7131945 - 2⁸ = 7131689 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7131947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3691 + ... + 5280.

It is an arithmetic number, because the mean of its divisors is an integer number (726732).

Almost surely, 2^7131945 is an apocalyptic number.

It is an amenable number.

7131945 is a deficient number, since it is larger than the sum of its proper divisors (4495767).

7131945 is a wasteful number, since it uses less digits than its factorization.

7131945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9032.

The product of its digits is 3780, while the sum is 30.

The square root of 7131945 is about 2670.5701638414. The cubic root of 7131945 is about 192.4875575249.

The spelling of 7131945 in words is "seven million, one hundred thirty-one thousand, nine hundred forty-five".