145215 has 24 divisors (see below), whose sum is σ = 288288. Its totient is φ = 66240.

The previous prime is 145213. The next prime is 145219. The reversal of 145215 is 512541.

It is not a de Polignac number, because 145215 - 2¹ = 145213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85 + ... + 545.

It is an arithmetic number, because the mean of its divisors is an integer number (12012).

2¹⁴⁵²¹⁵ is an apocalyptic number.

145215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145215 is a deficient number, since it is larger than the sum of its proper divisors (143073).

145215 is a wasteful number, since it uses less digits than its factorization.

145215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 476 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 145215 is about 381.0708595524. The cubic root of 145215 is about 52.5618319107.

Adding to 145215 its reverse (512541), we get a palindrome (657756).

The spelling of 145215 in words is "one hundred forty-five thousand, two hundred fifteen".