531242605 has 8 divisors (see below), whose sum is σ = 674990712. Its totient is φ = 399994368.

The previous prime is 531242599. The next prime is 531242609. The reversal of 531242605 is 506242135.

It can be written as a sum of positive squares in 4 ways, for example, as 226984356 + 304258249 = 15066^2 + 17443^2 .

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 531242605 - 2⁵ = 531242573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531242609) 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, 3124872 + ... + 3125041.

It is an arithmetic number, because the mean of its divisors is an integer number (84373839).

Almost surely, 2^531242605 is an apocalyptic number.

It is an amenable number.

531242605 is a deficient number, since it is larger than the sum of its proper divisors (143748107).

531242605 is a wasteful number, since it uses less digits than its factorization.

531242605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249935.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 531242605 is about 23048.7007226004. The cubic root of 531242605 is about 809.8991923522.

The spelling of 531242605 in words is "five hundred thirty-one million, two hundred forty-two thousand, six hundred five".