748781 has 4 divisors (see below), whose sum is σ = 816864. Its totient is φ = 680700.

The previous prime is 748777. The next prime is 748789. The reversal of 748781 is 187847.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 187847 = 11 ⋅17077.

It is a cyclic number.

It is not a de Polignac number, because 748781 - 2² = 748777 is a prime.

It is a super-2 number, since 2×748781² = 1121345971922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748789) 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, 34025 + ... + 34046.

It is an arithmetic number, because the mean of its divisors is an integer number (204216).

2⁷⁴⁸⁷⁸¹ is an apocalyptic number.

It is an amenable number.

748781 is a deficient number, since it is larger than the sum of its proper divisors (68083).

748781 is a wasteful number, since it uses less digits than its factorization.

748781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68082.

The product of its digits is 12544, while the sum is 35.

The square root of 748781 is about 865.3213276003. The cubic root of 748781 is about 90.8067791713.

The spelling of 748781 in words is "seven hundred forty-eight thousand, seven hundred eighty-one".