140732681 has 4 divisors (see below), whose sum is σ = 149011092. Its totient is φ = 132454272.

The previous prime is 140732659. The next prime is 140732687. The reversal of 140732681 is 186237041.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37405456 + 103327225 = 6116^2 + 10165^2 .

It is a cyclic number.

It is not a de Polignac number, because 140732681 - 2²² = 136538377 is a prime.

It is a super-2 number, since 2×140732681² = 39611375002895522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140732687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4139180 + ... + 4139213.

It is an arithmetic number, because the mean of its divisors is an integer number (37252773).

Almost surely, 2^140732681 is an apocalyptic number.

It is an amenable number.

140732681 is a deficient number, since it is larger than the sum of its proper divisors (8278411).

140732681 is an equidigital number, since it uses as much as digits as its factorization.

140732681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8278410.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 140732681 is about 11863.0805864244. The cubic root of 140732681 is about 520.1536540501.

The spelling of 140732681 in words is "one hundred forty million, seven hundred thirty-two thousand, six hundred eighty-one".