747445 has 4 divisors (see below), whose sum is σ = 896940. Its totient is φ = 597952.

The previous prime is 747427. The next prime is 747449. The reversal of 747445 is 544747.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 178929 + 568516 = 423^2 + 754^2 .

It is a cyclic number.

It is not a de Polignac number, because 747445 - 2¹¹ = 745397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74740 + ... + 74749.

It is an arithmetic number, because the mean of its divisors is an integer number (224235).

2⁷⁴⁷⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

747445 is a deficient number, since it is larger than the sum of its proper divisors (149495).

747445 is a wasteful number, since it uses less digits than its factorization.

747445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149494.

The product of its digits is 15680, while the sum is 31.

The square root of 747445 is about 864.5490153832. The cubic root of 747445 is about 90.7527401925.

The spelling of 747445 in words is "seven hundred forty-seven thousand, four hundred forty-five".