740531 has 8 divisors (see below), whose sum is σ = 843264. Its totient is φ = 643720.

The previous prime is 740527. The next prime is 740533. The reversal of 740531 is 135047.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 740531 - 2² = 740527 is a prime.

It is a super-2 number, since 2×740531² = 1096772323922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (740533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211 + ... + 1716.

It is an arithmetic number, because the mean of its divisors is an integer number (105408).

2⁷⁴⁰⁵³¹ is an apocalyptic number.

740531 is a deficient number, since it is larger than the sum of its proper divisors (102733).

740531 is a wasteful number, since it uses less digits than its factorization.

740531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961.

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

The square root of 740531 is about 860.5411088379. The cubic root of 740531 is about 90.4720465543.

Adding to 740531 its reverse (135047), we get a palindrome (875578).

The spelling of 740531 in words is "seven hundred forty thousand, five hundred thirty-one".