740405 has 8 divisors (see below), whose sum is σ = 893112. Its totient is φ = 589248.

The previous prime is 740387. The next prime is 740423. The reversal of 740405 is 504047.

740405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (740387) and next prime (740423).

It can be written as a sum of positive squares in 4 ways, for example, as 128881 + 611524 = 359^2 + 782^2 .

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 740405 - 2¹⁴ = 724021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 1667 + ... + 2063.

It is an arithmetic number, because the mean of its divisors is an integer number (111639).

2⁷⁴⁰⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

740405 is a deficient number, since it is larger than the sum of its proper divisors (152707).

740405 is a wasteful number, since it uses less digits than its factorization.

740405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 740405 is about 860.4678959729. The cubic root of 740405 is about 90.4669150453.

The spelling of 740405 in words is "seven hundred forty thousand, four hundred five".