7128541 has 8 divisors (see below), whose sum is σ = 8184320. Its totient is φ = 6082128.

The previous prime is 7128533. The next prime is 7128581. The reversal of 7128541 is 1458217.

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

It is a cyclic number.

It is not a de Polignac number, because 7128541 - 2³ = 7128533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7128581) 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, 621 + ... + 3826.

It is an arithmetic number, because the mean of its divisors is an integer number (1023040).

Almost surely, 2^7128541 is an apocalyptic number.

It is an amenable number.

7128541 is a deficient number, since it is larger than the sum of its proper divisors (1055779).

7128541 is a wasteful number, since it uses less digits than its factorization.

7128541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683.

The product of its digits is 2240, while the sum is 28.

The square root of 7128541 is about 2669.9327706892. The cubic root of 7128541 is about 192.4569285769.

The spelling of 7128541 in words is "seven million, one hundred twenty-eight thousand, five hundred forty-one".