145977 has 16 divisors (see below), whose sum is σ = 221760. Its totient is φ = 84672.

The previous prime is 145969. The next prime is 145987. The reversal of 145977 is 779541.

145977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145977 - 2³ = 145969 is a prime.

145977 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643 + ... + 839.

It is an arithmetic number, because the mean of its divisors is an integer number (13860).

2¹⁴⁵⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

145977 is a deficient number, since it is larger than the sum of its proper divisors (75783).

145977 is a wasteful number, since it uses less digits than its factorization.

145977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232.

The product of its digits is 8820, while the sum is 33.

The square root of 145977 is about 382.0693654299. The cubic root of 145977 is about 52.6536090758.

The spelling of 145977 in words is "one hundred forty-five thousand, nine hundred seventy-seven".