747240845 has 8 divisors (see below), whose sum is σ = 965665176. Its totient is φ = 551808576.

The previous prime is 747240817. The next prime is 747240853. The reversal of 747240845 is 548042747.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51652969 + 695587876 = 7187^2 + 26374^2 .

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 747240845 - 2¹⁰ = 747239821 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5747942 + ... + 5748071.

It is an arithmetic number, because the mean of its divisors is an integer number (120708147).

Almost surely, 2^747240845 is an apocalyptic number.

It is an amenable number.

747240845 is a deficient number, since it is larger than the sum of its proper divisors (218424331).

747240845 is a wasteful number, since it uses less digits than its factorization.

747240845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11496031.

The product of its (nonzero) digits is 250880, while the sum is 41.

The square root of 747240845 is about 27335.7064112124. The cubic root of 747240845 is about 907.4447679176. Note that the first 3 decimals are identical.

The spelling of 747240845 in words is "seven hundred forty-seven million, two hundred forty thousand, eight hundred forty-five".