140111281 has 4 divisors (see below), whose sum is σ = 140138100. Its totient is φ = 140084464.

The previous prime is 140111261. The next prime is 140111311. The reversal of 140111281 is 182111041.

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 43678881 + 96432400 = 6609^2 + 9820^2 .

It is a cyclic number.

It is not a de Polignac number, because 140111281 - 2¹⁵ = 140078513 is a prime.

It is a super-2 number, since 2×140111281² = 39262342126921922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140111201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2746 + ... + 16963.

It is an arithmetic number, because the mean of its divisors is an integer number (35034525).

Almost surely, 2^140111281 is an apocalyptic number.

It is an amenable number.

140111281 is a deficient number, since it is larger than the sum of its proper divisors (26819).

140111281 is an equidigital number, since it uses as much as digits as its factorization.

140111281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26818.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 140111281 is about 11836.8611126430. The cubic root of 140111281 is about 519.3869513532.

The spelling of 140111281 in words is "one hundred forty million, one hundred eleven thousand, two hundred eighty-one".