748645 has 4 divisors (see below), whose sum is σ = 898380. Its totient is φ = 598912.

The previous prime is 748639. The next prime is 748669. The reversal of 748645 is 546847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546847 = 7 ⋅78121.

It can be written as a sum of positive squares in 2 ways, for example, as 471969 + 276676 = 687^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 748645 - 2³ = 748637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 748645.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 74860 + ... + 74869.

It is an arithmetic number, because the mean of its divisors is an integer number (224595).

2⁷⁴⁸⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

748645 is a deficient number, since it is larger than the sum of its proper divisors (149735).

748645 is a wasteful number, since it uses less digits than its factorization.

748645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149734.

The product of its digits is 26880, while the sum is 34.

The square root of 748645 is about 865.2427405070. The cubic root of 748645 is about 90.8012811375.

The spelling of 748645 in words is "seven hundred forty-eight thousand, six hundred forty-five".