312245 has 8 divisors (see below), whose sum is σ = 377784. Its totient is φ = 247744.

The previous prime is 312241. The next prime is 312251. The reversal of 312245 is 542213.

It can be written as a sum of positive squares in 4 ways, for example, as 40804 + 271441 = 202^2 + 521^2 .

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 312245 - 2² = 312241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312241) 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, 827 + ... + 1143.

It is an arithmetic number, because the mean of its divisors is an integer number (47223).

2³¹²²⁴⁵ is an apocalyptic number.

It is an amenable number.

312245 is a deficient number, since it is larger than the sum of its proper divisors (65539).

312245 is a wasteful number, since it uses less digits than its factorization.

312245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its digits is 240, while the sum is 17.

The square root of 312245 is about 558.7888688941. The cubic root of 312245 is about 67.8419773522.

Adding to 312245 its reverse (542213), we get a palindrome (854458).

The spelling of 312245 in words is "three hundred twelve thousand, two hundred forty-five".