321250045 has 4 divisors (see below), whose sum is σ = 385500060. Its totient is φ = 257000032.

The previous prime is 321250001. The next prime is 321250049. The reversal of 321250045 is 540052123.

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 228281881 + 92968164 = 15109^2 + 9642^2 .

It is a cyclic number.

It is not a de Polignac number, because 321250045 - 2²¹ = 319152893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321249998 and 321250025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321250049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32125000 + ... + 32125009.

It is an arithmetic number, because the mean of its divisors is an integer number (96375015).

Almost surely, 2^321250045 is an apocalyptic number.

It is an amenable number.

321250045 is a deficient number, since it is larger than the sum of its proper divisors (64250015).

321250045 is an equidigital number, since it uses as much as digits as its factorization.

321250045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64250014.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 321250045 is about 17923.4495842737. The cubic root of 321250045 is about 684.8798659801.

The spelling of 321250045 in words is "three hundred twenty-one million, two hundred fifty thousand, forty-five".