145399 has 2 divisors, whose sum is σ = 145400. Its totient is φ = 145398.

The previous prime is 145391. The next prime is 145417. The reversal of 145399 is 993541.

It is a weak prime.

It is an emirp because it is prime and its reverse (993541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145399 - 2³ = 145391 is a prime.

It is a super-2 number, since 2×145399² = 42281738402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72699 + 72700.

It is an arithmetic number, because the mean of its divisors is an integer number (72700).

2¹⁴⁵³⁹⁹ is an apocalyptic number.

145399 is a deficient number, since it is larger than the sum of its proper divisors (1).

145399 is an equidigital number, since it uses as much as digits as its factorization.

145399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 31.

The square root of 145399 is about 381.3122080396. The cubic root of 145399 is about 52.5840226741.

The spelling of 145399 in words is "one hundred forty-five thousand, three hundred ninety-nine".