6553945 has 4 divisors (see below), whose sum is σ = 7864740. Its totient is φ = 5243152.

The previous prime is 6553933. The next prime is 6553949. The reversal of 6553945 is 5493556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 870489 + 5683456 = 933^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 6553945 - 2⁷ = 6553817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6553949) 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, 655390 + ... + 655399.

It is an arithmetic number, because the mean of its divisors is an integer number (1966185).

Almost surely, 2^6553945 is an apocalyptic number.

It is an amenable number.

6553945 is a deficient number, since it is larger than the sum of its proper divisors (1310795).

6553945 is a wasteful number, since it uses less digits than its factorization.

6553945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310794.

The product of its digits is 81000, while the sum is 37.

The square root of 6553945 is about 2560.0673819257. The cubic root of 6553945 is about 187.1404189970.

The spelling of 6553945 in words is "six million, five hundred fifty-three thousand, nine hundred forty-five".