145769 has 4 divisors (see below), whose sum is σ = 156996. Its totient is φ = 134544.

The previous prime is 145759. The next prime is 145771. The reversal of 145769 is 967541.

145769 = 62² + 63² + ... + 87².

It is a happy number.

145769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12544 + 133225 = 112^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 145769 - 2⁴ = 145753 is a prime.

It is a super-2 number, since 2×145769² = 42497202722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5594 + ... + 5619.

It is an arithmetic number, because the mean of its divisors is an integer number (39249).

2¹⁴⁵⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

145769 is a deficient number, since it is larger than the sum of its proper divisors (11227).

145769 is a wasteful number, since it uses less digits than its factorization.

145769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11226.

The product of its digits is 7560, while the sum is 32.

The square root of 145769 is about 381.7970665157. The cubic root of 145769 is about 52.6285887950.

The spelling of 145769 in words is "one hundred forty-five thousand, seven hundred sixty-nine".