749731 has 8 divisors (see below), whose sum is σ = 804384. Its totient is φ = 696960.

The previous prime is 749729. The next prime is 749741. The reversal of 749731 is 137947.

749731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 749731 - 2¹ = 749729 is a prime.

It is a super-2 number, since 2×749731² = 1124193144722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 749693 and 749702.

It is not an unprimeable number, because it can be changed into a prime (749701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411 + ... + 1291.

It is an arithmetic number, because the mean of its divisors is an integer number (100548).

2⁷⁴⁹⁷³¹ is an apocalyptic number.

749731 is a deficient number, since it is larger than the sum of its proper divisors (54653).

749731 is a wasteful number, since it uses less digits than its factorization.

749731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941.

The product of its digits is 5292, while the sum is 31.

The square root of 749731 is about 865.8700826336. The cubic root of 749731 is about 90.8451659996.

Subtracting from 749731 its sum of digits (31), we obtain a triangular number (749700 = T₁₂₂₄).

The spelling of 749731 in words is "seven hundred forty-nine thousand, seven hundred thirty-one".