248645 has 6 divisors (see below), whose sum is σ = 299718. Its totient is φ = 198024.

The previous prime is 248641. The next prime is 248657. The reversal of 248645 is 546842.

It can be written as a sum of positive squares in only one way, i.e., 198916 + 49729 = 446^2 + 223^2 .

It is not a de Polignac number, because 248645 - 2² = 248641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1004 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (49953).

2²⁴⁸⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

248645 is a deficient number, since it is larger than the sum of its proper divisors (51073).

248645 is an frugal number, since it uses more digits than its factorization.

248645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 228 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 248645 is about 498.6431589825. The cubic root of 248645 is about 62.8820333833.

The spelling of 248645 in words is "two hundred forty-eight thousand, six hundred forty-five".