747405 has 24 divisors (see below), whose sum is σ = 1373112. Its totient is φ = 374784.

The previous prime is 747401. The next prime is 747407. The reversal of 747405 is 504747.

It can be written as a sum of positive squares in 4 ways, for example, as 335241 + 412164 = 579^2 + 642^2 .

It is not a de Polignac number, because 747405 - 2² = 747401 is a prime.

It is a super-2 number, since 2×747405² = 1117228468050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (57213).

2⁷⁴⁷⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

747405 is a deficient number, since it is larger than the sum of its proper divisors (625707).

747405 is a wasteful number, since it uses less digits than its factorization.

747405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 747405 is about 864.5258816253. The cubic root of 747405 is about 90.7511212666.

The spelling of 747405 in words is "seven hundred forty-seven thousand, four hundred five".