145513 has 2 divisors, whose sum is σ = 145514. Its totient is φ = 145512.

The previous prime is 145511. The next prime is 145517. The reversal of 145513 is 315541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123904 + 21609 = 352^2 + 147^2 .

It is a cyclic number.

It is not a de Polignac number, because 145513 - 2¹ = 145511 is a prime.

Together with 145511, it forms a pair of twin primes.

It is equal to p₁₃₄₆₅ and since 145513 and 13465 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (145511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72756 + 72757.

It is an arithmetic number, because the mean of its divisors is an integer number (72757).

2¹⁴⁵⁵¹³ is an apocalyptic number.

It is an amenable number.

145513 is a deficient number, since it is larger than the sum of its proper divisors (1).

145513 is an equidigital number, since it uses as much as digits as its factorization.

145513 is an evil number, because the sum of its binary digits is even.

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

The square root of 145513 is about 381.4616625560. The cubic root of 145513 is about 52.5977619080.

It can be divided in two parts, 1455 and 13, that multiplied together give a triangular number (18915 = T₁₉₄).

The spelling of 145513 in words is "one hundred forty-five thousand, five hundred thirteen".