245142 has 12 divisors (see below), whose sum is σ = 531180. Its totient is φ = 81708.

The previous prime is 245131. The next prime is 245149. The reversal of 245142 is 241542.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 13619 = 245142 / (2 + 4 + 5 + 1 + 4 + 2).

It is a nialpdrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 245142.

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

245142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6792 + ... + 6827.

It is an arithmetic number, because the mean of its divisors is an integer number (44265).

2²⁴⁵¹⁴² is an apocalyptic number.

245142 is an abundant number, since it is smaller than the sum of its proper divisors (286038).

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

245142 is a wasteful number, since it uses less digits than its factorization.

245142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13627 (or 13624 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 245142 is about 495.1181677135. The cubic root of 245142 is about 62.5853341031.

Adding to 245142 its reverse (241542), we get a palindrome (486684).

Subtracting from 245142 its reverse (241542), we obtain a square (3600 = 60²).

The spelling of 245142 in words is "two hundred forty-five thousand, one hundred forty-two".