245140 has 48 divisors (see below), whose sum is σ = 628992. Its totient is φ = 78336.

The previous prime is 245131. The next prime is 245149. The reversal of 245140 is 41542.

It is an interprime number because it is at equal distance from previous prime (245131) and next prime (245149).

It is a super-4 number, since 4×245140⁴ (a number of 23 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2329 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (13104).

2²⁴⁵¹⁴⁰ is an apocalyptic number.

245140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314496).

245140 is an abundant number, since it is smaller than the sum of its proper divisors (383852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245140 is a wasteful number, since it uses less digits than its factorization.

245140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 245140 is about 495.1161479895. The cubic root of 245140 is about 62.5851639011.

Adding to 245140 its reverse (41542), we get a palindrome (286682).

The spelling of 245140 in words is "two hundred forty-five thousand, one hundred forty".