5240645 has 4 divisors (see below), whose sum is σ = 6288780. Its totient is φ = 4192512.

The previous prime is 5240639. The next prime is 5240647. The reversal of 5240645 is 5460425.

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 4024036 + 1216609 = 2006^2 + 1103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5240645 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5240647) 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, 524060 + ... + 524069.

It is an arithmetic number, because the mean of its divisors is an integer number (1572195).

Almost surely, 2^5240645 is an apocalyptic number.

It is an amenable number.

5240645 is a deficient number, since it is larger than the sum of its proper divisors (1048135).

5240645 is a wasteful number, since it uses less digits than its factorization.

5240645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048134.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 5240645 is about 2289.2455088959. The cubic root of 5240645 is about 173.6980383929.

It can be divided in two parts, 5240 and 645, that added together give a palindrome (5885).

The spelling of 5240645 in words is "five million, two hundred forty thousand, six hundred forty-five".