747945 has 24 divisors (see below), whose sum is σ = 1415232. Its totient is φ = 362400.

The previous prime is 747941. The next prime is 747953. The reversal of 747945 is 549747.

It is a happy number.

It is not a de Polignac number, because 747945 - 2² = 747941 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (747941) 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 23 ways as a sum of consecutive naturals, for example, 261 + ... + 1250.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2⁷⁴⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

747945 is a deficient number, since it is larger than the sum of its proper divisors (667287).

747945 is a wasteful number, since it uses less digits than its factorization.

747945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533 (or 1530 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 747945 is about 864.8381351444. The cubic root of 747945 is about 90.7729718955.

Adding to 747945 its product of digits (35280), we get a square (783225 = 885²).

The spelling of 747945 in words is "seven hundred forty-seven thousand, nine hundred forty-five".