6523945 has 8 divisors (see below), whose sum is σ = 7860744. Its totient is φ = 5197824.

The previous prime is 6523943. The next prime is 6523963. The reversal of 6523945 is 5493256.

6523945 = 13² + 14² + ... + 269².

It can be written as a sum of positive squares in 4 ways, for example, as 4380649 + 2143296 = 2093^2 + 1464^2 .

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 6523945 - 2¹ = 6523943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6523945.

It is not an unprimeable number, because it can be changed into a prime (6523943) 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, 1254 + ... + 3823.

It is an arithmetic number, because the mean of its divisors is an integer number (982593).

Almost surely, 2^6523945 is an apocalyptic number.

It is an amenable number.

6523945 is a deficient number, since it is larger than the sum of its proper divisors (1336799).

6523945 is a wasteful number, since it uses less digits than its factorization.

6523945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339.

The product of its digits is 32400, while the sum is 34.

The square root of 6523945 is about 2554.2014407638. The cubic root of 6523945 is about 186.8544436250.

The spelling of 6523945 in words is "six million, five hundred twenty-three thousand, nine hundred forty-five".