523240 has 32 divisors (see below), whose sum is σ = 1198080. Its totient is φ = 205632.

The previous prime is 523219. The next prime is 523261. The reversal of 523240 is 42325.

It is an interprime number because it is at equal distance from previous prime (523219) and next prime (523261).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4057 + ... + 4183.

It is an arithmetic number, because the mean of its divisors is an integer number (37440).

2⁵²³²⁴⁰ is an apocalyptic number.

It is an amenable number.

523240 is an abundant number, since it is smaller than the sum of its proper divisors (674840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523240 is a wasteful number, since it uses less digits than its factorization.

523240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 523240 is about 723.3533023357. The cubic root of 523240 is about 80.5811842530.

Adding to 523240 its reverse (42325), we get a palindrome (565565).

The spelling of 523240 in words is "five hundred twenty-three thousand, two hundred forty".