140000247 has 24 divisors (see below), whose sum is σ = 209505920. Its totient is φ = 89994240.

The previous prime is 140000213. The next prime is 140000249. The reversal of 140000247 is 742000041.

It is a happy number.

It is not a de Polignac number, because 140000247 - 2⁸ = 139999991 is a prime.

It is a super-2 number, since 2×140000247² = 39200138320122018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140000249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93279 + ... + 94767.

Almost surely, 2^140000247 is an apocalyptic number.

140000247 is a deficient number, since it is larger than the sum of its proper divisors (69505673).

140000247 is a wasteful number, since it uses less digits than its factorization.

140000247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863 (or 1860 counting only the distinct ones).

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

The square root of 140000247 is about 11832.1700038497. The cubic root of 140000247 is about 519.2497155530.

Adding to 140000247 its reverse (742000041), we get a palindrome (882000288).

The spelling of 140000247 in words is "one hundred forty million, two hundred forty-seven", and thus it is an aban number.