145415 has 8 divisors (see below), whose sum is σ = 176640. Its totient is φ = 114912.

The previous prime is 145399. The next prime is 145417. The reversal of 145415 is 514541.

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

It is a cyclic number.

It is not a de Polignac number, because 145415 - 2⁴ = 145399 is a prime.

It is a super-2 number, since 2×145415² = 42291044450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521 + ... + 749.

It is an arithmetic number, because the mean of its divisors is an integer number (22080).

2¹⁴⁵⁴¹⁵ is an apocalyptic number.

145415 is a deficient number, since it is larger than the sum of its proper divisors (31225).

145415 is a wasteful number, since it uses less digits than its factorization.

145415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361.

The product of its digits is 400, while the sum is 20.

The square root of 145415 is about 381.3331876457. Note that the first 3 decimals coincide. The cubic root of 145415 is about 52.5859514208.

Adding to 145415 its reverse (514541), we get a palindrome (659956).

The spelling of 145415 in words is "one hundred forty-five thousand, four hundred fifteen".