7491745 has 4 divisors (see below), whose sum is σ = 8990100. Its totient is φ = 5993392.

The previous prime is 7491733. The next prime is 7491749. The reversal of 7491745 is 5471947.

7491745 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5471947 = 13 ⋅420919.

It can be written as a sum of positive squares in 2 ways, for example, as 2634129 + 4857616 = 1623^2 + 2204^2 .

It is a cyclic number.

It is not a de Polignac number, because 7491745 - 2¹⁷ = 7360673 is a prime.

It is a super-2 number, since 2×7491745² = 112252486290050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7491749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749170 + ... + 749179.

It is an arithmetic number, because the mean of its divisors is an integer number (2247525).

Almost surely, 2^7491745 is an apocalyptic number.

It is an amenable number.

7491745 is a deficient number, since it is larger than the sum of its proper divisors (1498355).

7491745 is a wasteful number, since it uses less digits than its factorization.

7491745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498354.

The product of its digits is 35280, while the sum is 37.

The square root of 7491745 is about 2737.1052226760. The cubic root of 7491745 is about 195.6715396219.

It can be divided in two parts, 74 and 91745, that added together give a palindrome (91819).

The spelling of 7491745 in words is "seven million, four hundred ninety-one thousand, seven hundred forty-five".