746521 has 4 divisors (see below), whose sum is σ = 790452. Its totient is φ = 702592.

The previous prime is 746509. The next prime is 746531. The reversal of 746521 is 125647.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 577600 + 168921 = 760^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 746521 - 2¹⁵ = 713753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (746531) 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, 21940 + ... + 21973.

It is an arithmetic number, because the mean of its divisors is an integer number (197613).

2⁷⁴⁶⁵²¹ is an apocalyptic number.

It is an amenable number.

746521 is a deficient number, since it is larger than the sum of its proper divisors (43931).

746521 is a wasteful number, since it uses less digits than its factorization.

746521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43930.

The product of its digits is 1680, while the sum is 25.

The square root of 746521 is about 864.0144674715. The cubic root of 746521 is about 90.7153282492.

Subtracting from 746521 its sum of digits (25), we obtain a square (746496 = 864²).

The spelling of 746521 in words is "seven hundred forty-six thousand, five hundred twenty-one".