145315 has 4 divisors (see below), whose sum is σ = 174384. Its totient is φ = 116248.

The previous prime is 145307. The next prime is 145349. The reversal of 145315 is 513541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 513541 = 7 ⋅73363.

It is a cyclic number.

It is not a de Polignac number, because 145315 - 2³ = 145307 is a prime.

It is a super-2 number, since 2×145315² = 42232898450, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145292 and 145301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14527 + ... + 14536.

It is an arithmetic number, because the mean of its divisors is an integer number (43596).

2¹⁴⁵³¹⁵ is an apocalyptic number.

145315 is a deficient number, since it is larger than the sum of its proper divisors (29069).

145315 is an equidigital number, since it uses as much as digits as its factorization.

145315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29068.

The product of its digits is 300, while the sum is 19.

The square root of 145315 is about 381.2020461645. The cubic root of 145315 is about 52.5738944321.

Adding to 145315 its reverse (513541), we get a palindrome (658856).

It can be divided in two parts, 14 and 5315, that added together give a square (5329 = 73²).

The spelling of 145315 in words is "one hundred forty-five thousand, three hundred fifteen".