145477 has 2 divisors, whose sum is σ = 145478. Its totient is φ = 145476.

The previous prime is 145471. The next prime is 145487. The reversal of 145477 is 774541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103041 + 42436 = 321^2 + 206^2 .

It is an emirp because it is prime and its reverse (774541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145477 - 2⁷ = 145349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145471) 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 as a sum of consecutive naturals, namely, 72738 + 72739.

It is an arithmetic number, because the mean of its divisors is an integer number (72739).

2¹⁴⁵⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

145477 is a deficient number, since it is larger than the sum of its proper divisors (1).

145477 is an equidigital number, since it uses as much as digits as its factorization.

145477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3920, while the sum is 28.

The square root of 145477 is about 381.4144727196. The cubic root of 145477 is about 52.5934239780.

The spelling of 145477 in words is "one hundred forty-five thousand, four hundred seventy-seven".