140781231 has 12 divisors (see below), whose sum is σ = 203477352. Its totient is φ = 93795696.

The previous prime is 140781217. The next prime is 140781247. The reversal of 140781231 is 132187041.

It is not a de Polignac number, because 140781231 - 2⁷ = 140781103 is a prime.

It is a super-2 number, since 2×140781231² = 39638710003750722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140781195 and 140781204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140781211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14385 + ... + 22101.

It is an arithmetic number, because the mean of its divisors is an integer number (16956446).

Almost surely, 2^140781231 is an apocalyptic number.

140781231 is a deficient number, since it is larger than the sum of its proper divisors (62696121).

140781231 is a wasteful number, since it uses less digits than its factorization.

140781231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9750 (or 9747 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 140781231 is about 11865.1266744186. The cubic root of 140781231 is about 520.2134614246.

The spelling of 140781231 in words is "one hundred forty million, seven hundred eighty-one thousand, two hundred thirty-one".