740509 has 16 divisors (see below), whose sum is σ = 944640. Its totient is φ = 563760.

The previous prime is 740483. The next prime is 740513. The reversal of 740509 is 905047.

It is a cyclic number.

It is not a de Polignac number, because 740509 - 2⁵ = 740477 is a prime.

It is a Duffinian number.

740509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740549) 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 15 ways as a sum of consecutive naturals, for example, 4462 + ... + 4624.

It is an arithmetic number, because the mean of its divisors is an integer number (59040).

2⁷⁴⁰⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

740509 is a deficient number, since it is larger than the sum of its proper divisors (204131).

740509 is a wasteful number, since it uses less digits than its factorization.

740509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 740509 is about 860.5283260881. The cubic root of 740509 is about 90.4711506184.

The spelling of 740509 in words is "seven hundred forty thousand, five hundred nine".