140247 has 6 divisors (see below), whose sum is σ = 202592. Its totient is φ = 93492.

The previous prime is 140237. The next prime is 140249. The reversal of 140247 is 742041.

It is a happy number.

It is not a de Polignac number, because 140247 - 2⁸ = 139991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7783 + ... + 7800.

2¹⁴⁰²⁴⁷ is an apocalyptic number.

140247 is a deficient number, since it is larger than the sum of its proper divisors (62345).

140247 is a wasteful number, since it uses less digits than its factorization.

140247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15589 (or 15586 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 140247 is about 374.4956608560. The cubic root of 140247 is about 51.9554598881.

Adding to 140247 its reverse (742041), we get a palindrome (882288).

The spelling of 140247 in words is "one hundred forty thousand, two hundred forty-seven", and thus it is an iban number.