752921 has 4 divisors (see below), whose sum is σ = 810852. Its totient is φ = 694992.

The previous prime is 752911. The next prime is 752929. The reversal of 752921 is 129257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129257 = 19 ⋅6803.

It can be written as a sum of positive squares in 2 ways, for example, as 290521 + 462400 = 539^2 + 680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-752921 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 752921.

It is not an unprimeable number, because it can be changed into a prime (752929) 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, 28946 + ... + 28971.

It is an arithmetic number, because the mean of its divisors is an integer number (202713).

2⁷⁵²⁹²¹ is an apocalyptic number.

It is an amenable number.

752921 is a deficient number, since it is larger than the sum of its proper divisors (57931).

752921 is a wasteful number, since it uses less digits than its factorization.

752921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57930.

The product of its digits is 1260, while the sum is 26.

The square root of 752921 is about 867.7102050800. The cubic root of 752921 is about 90.9738281618.

The spelling of 752921 in words is "seven hundred fifty-two thousand, nine hundred twenty-one".