747321 has 4 divisors (see below), whose sum is σ = 996432. Its totient is φ = 498212.

The previous prime is 747319. The next prime is 747323. The reversal of 747321 is 123747.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (747319) and next prime (747323).

It is a cyclic number.

It is not a de Polignac number, because 747321 - 2¹ = 747319 is a prime.

It is a D-number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 747291 and 747300.

It is not an unprimeable number, because it can be changed into a prime (747323) 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, 124551 + ... + 124556.

It is an arithmetic number, because the mean of its divisors is an integer number (249108).

2⁷⁴⁷³²¹ is an apocalyptic number.

It is an amenable number.

747321 is a deficient number, since it is larger than the sum of its proper divisors (249111).

747321 is a wasteful number, since it uses less digits than its factorization.

747321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249110.

The product of its digits is 1176, while the sum is 24.

The square root of 747321 is about 864.4772987187. The cubic root of 747321 is about 90.7477213340.

The spelling of 747321 in words is "seven hundred forty-seven thousand, three hundred twenty-one", and thus it is an iban number.