140549 has 2 divisors, whose sum is σ = 140550. Its totient is φ = 140548.

The previous prime is 140533. The next prime is 140551. The reversal of 140549 is 945041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93025 + 47524 = 305^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 140549 - 2⁴ = 140533 is a prime.

Together with 140551, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70274 + 70275.

It is an arithmetic number, because the mean of its divisors is an integer number (70275).

2¹⁴⁰⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

140549 is a deficient number, since it is larger than the sum of its proper divisors (1).

140549 is an equidigital number, since it uses as much as digits as its factorization.

140549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 140549 is about 374.8986529717. The cubic root of 140549 is about 51.9927258069.

The spelling of 140549 in words is "one hundred forty thousand, five hundred forty-nine".