140458 has 4 divisors (see below), whose sum is σ = 210690. Its totient is φ = 70228.

The previous prime is 140453. The next prime is 140473. The reversal of 140458 is 854041.

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

It can be written as a sum of positive squares in only one way, i.e., 71289 + 69169 = 267^2 + 263^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 7 and base 16.

It is not an unprimeable number, because it can be changed into a prime (140453) 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, 35113 + ... + 35116.

2¹⁴⁰⁴⁵⁸ is an apocalyptic number.

140458 is a deficient number, since it is larger than the sum of its proper divisors (70232).

140458 is an equidigital number, since it uses as much as digits as its factorization.

140458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70231.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 140458 is about 374.7772671868. Note that the first 3 decimals coincide. The cubic root of 140458 is about 51.9815022964.

Adding to 140458 its reverse (854041), we get a palindrome (994499).

The spelling of 140458 in words is "one hundred forty thousand, four hundred fifty-eight".