145697 has 4 divisors (see below), whose sum is σ = 148500. Its totient is φ = 142896.

The previous prime is 145687. The next prime is 145703. The reversal of 145697 is 796541.

It is a happy number.

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 58081 + 87616 = 241^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 145697 - 2⁴ = 145681 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145697.

It is not an unprimeable number, because it can be changed into a prime (145637) 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 in 3 ways as a sum of consecutive naturals, for example, 1322 + ... + 1427.

It is an arithmetic number, because the mean of its divisors is an integer number (37125).

2¹⁴⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

145697 is a deficient number, since it is larger than the sum of its proper divisors (2803).

145697 is an equidigital number, since it uses as much as digits as its factorization.

145697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802.

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

The square root of 145697 is about 381.7027639407. The cubic root of 145697 is about 52.6199223835.

The spelling of 145697 in words is "one hundred forty-five thousand, six hundred ninety-seven".