140245731 has 6 divisors (see below), whose sum is σ = 202577180. Its totient is φ = 93497148.

The previous prime is 140245723. The next prime is 140245739. The reversal of 140245731 is 137542041.

It is an interprime number because it is at equal distance from previous prime (140245723) and next prime (140245739).

It is not a de Polignac number, because 140245731 - 2³ = 140245723 is a prime.

It is a super-2 number, since 2×140245731² = 39337730127448722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140245695 and 140245704.

It is not an unprimeable number, because it can be changed into a prime (140245739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7791421 + ... + 7791438.

Almost surely, 2^140245731 is an apocalyptic number.

140245731 is a deficient number, since it is larger than the sum of its proper divisors (62331449).

140245731 is a wasteful number, since it uses less digits than its factorization.

140245731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15582865 (or 15582862 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 140245731 is about 11842.5390436342. The cubic root of 140245731 is about 519.5530318438.

Adding to 140245731 its reverse (137542041), we get a palindrome (277787772).

The spelling of 140245731 in words is "one hundred forty million, two hundred forty-five thousand, seven hundred thirty-one".