245138 has 8 divisors (see below), whose sum is σ = 387120. Its totient is φ = 116100.

The previous prime is 245131. The next prime is 245149. The reversal of 245138 is 831542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×245138⁴ (a number of 23 digits) contains 4444 as substring.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 245138.

It is not an unprimeable number, because it can be changed into a prime (245131) 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 3 ways as a sum of consecutive naturals, for example, 3188 + ... + 3263.

It is an arithmetic number, because the mean of its divisors is an integer number (48390).

2²⁴⁵¹³⁸ is an apocalyptic number.

245138 is a deficient number, since it is larger than the sum of its proper divisors (141982).

245138 is a wasteful number, since it uses less digits than its factorization.

245138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6472.

The product of its digits is 960, while the sum is 23.

The square root of 245138 is about 495.1141282573. The cubic root of 245138 is about 62.5849936981.

It can be divided in two parts, 245 and 138, that added together give a palindrome (383).

The spelling of 245138 in words is "two hundred forty-five thousand, one hundred thirty-eight".