531740 has 24 divisors (see below), whose sum is σ = 1218672. Its totient is φ = 193280.

The previous prime is 531731. The next prime is 531793. The reversal of 531740 is 47135.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 531740.

It is an unprimeable number.

531740 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 989 + ... + 1428.

It is an arithmetic number, because the mean of its divisors is an integer number (50778).

2⁵³¹⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

531740 is an abundant number, since it is smaller than the sum of its proper divisors (686932).

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

531740 is a wasteful number, since it uses less digits than its factorization.

531740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2437 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 531740 is about 729.2050466090. The cubic root of 531740 is about 81.0151879258.

Adding to 531740 its reverse (47135), we get a palindrome (578875).

The spelling of 531740 in words is "five hundred thirty-one thousand, seven hundred forty".