749531 has 8 divisors (see below), whose sum is σ = 798720. Its totient is φ = 701352.

The previous prime is 749471. The next prime is 749543. The reversal of 749531 is 135947.

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 749531 - 2⁶ = 749467 is a prime.

It is a super-2 number, since 2×749531² = 1123593439922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 749494 and 749503.

It is not an unprimeable number, because it can be changed into a prime (749431) 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, 1766 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (99840).

2⁷⁴⁹⁵³¹ is an apocalyptic number.

749531 is a deficient number, since it is larger than the sum of its proper divisors (49189).

749531 is a wasteful number, since it uses less digits than its factorization.

749531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

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

The square root of 749531 is about 865.7545841634. The cubic root of 749531 is about 90.8370872580.

The spelling of 749531 in words is "seven hundred forty-nine thousand, five hundred thirty-one".