7440745 has 8 divisors (see below), whose sum is σ = 9615816. Its totient is φ = 5494656.

The previous prime is 7440739. The next prime is 7440749. The reversal of 7440745 is 5470447.

It can be written as a sum of positive squares in 4 ways, for example, as 534361 + 6906384 = 731^2 + 2628^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7440745 is a prime.

It is a Duffinian number.

7440745 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7440749) 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 7 ways as a sum of consecutive naturals, for example, 57172 + ... + 57301.

It is an arithmetic number, because the mean of its divisors is an integer number (1201977).

Almost surely, 2^7440745 is an apocalyptic number.

It is an amenable number.

7440745 is a deficient number, since it is larger than the sum of its proper divisors (2175071).

7440745 is a wasteful number, since it uses less digits than its factorization.

7440745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114491.

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

The square root of 7440745 is about 2727.7729011045. The cubic root of 7440745 is about 195.2265173960.

The spelling of 7440745 in words is "seven million, four hundred forty thousand, seven hundred forty-five".