749513 has 4 divisors (see below), whose sum is σ = 793620. Its totient is φ = 705408.

The previous prime is 749471. The next prime is 749543. The reversal of 749513 is 315947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315947 = 139 ⋅2273.

It can be written as a sum of positive squares in 2 ways, for example, as 466489 + 283024 = 683^2 + 532^2 .

It is a cyclic number.

It is not a de Polignac number, because 749513 - 2⁶ = 749449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749543) 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, 22028 + ... + 22061.

It is an arithmetic number, because the mean of its divisors is an integer number (198405).

2⁷⁴⁹⁵¹³ is an apocalyptic number.

It is an amenable number.

749513 is a deficient number, since it is larger than the sum of its proper divisors (44107).

749513 is a wasteful number, since it uses less digits than its factorization.

749513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44106.

The product of its digits is 3780, while the sum is 29.

The square root of 749513 is about 865.7441885453. The cubic root of 749513 is about 90.8363601008.

The spelling of 749513 in words is "seven hundred forty-nine thousand, five hundred thirteen".