740905 has 16 divisors (see below), whose sum is σ = 1022400. Its totient is φ = 509760.

The previous prime is 740903. The next prime is 740923. The reversal of 740905 is 509047.

740905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 740905 - 2¹ = 740903 is a prime.

740905 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 740905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (63900).

2⁷⁴⁰⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

740905 is a deficient number, since it is larger than the sum of its proper divisors (281495).

740905 is a wasteful number, since it uses less digits than its factorization.

740905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744.

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

The square root of 740905 is about 860.7583865406. The cubic root of 740905 is about 90.4872747489.

The spelling of 740905 in words is "seven hundred forty thousand, nine hundred five".