749281 has 4 divisors (see below), whose sum is σ = 806932. Its totient is φ = 691632.

The previous prime is 749279. The next prime is 749297. The reversal of 749281 is 182947.

749281 = T₃₃₃ + T₃₃₄ + ... + T₃₄₅.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182947 = 113 ⋅1619.

It can be written as a sum of positive squares in 2 ways, for example, as 266256 + 483025 = 516^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 749281 - 2¹ = 749279 is a prime.

It is a super-2 number, since 2×749281² = 1122844033922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749081) 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, 28806 + ... + 28831.

It is an arithmetic number, because the mean of its divisors is an integer number (201733).

2⁷⁴⁹²⁸¹ is an apocalyptic number.

It is an amenable number.

749281 is a deficient number, since it is larger than the sum of its proper divisors (57651).

749281 is a wasteful number, since it uses less digits than its factorization.

749281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57650.

The product of its digits is 4032, while the sum is 31.

The square root of 749281 is about 865.6101894040. The cubic root of 749281 is about 90.8269868098.

The spelling of 749281 in words is "seven hundred forty-nine thousand, two hundred eighty-one".