140315281 has 4 divisors (see below), whose sum is σ = 140454000. Its totient is φ = 140176564.

The previous prime is 140315267. The next prime is 140315291. The reversal of 140315281 is 182513041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 182513041 = 12157 ⋅15013.

It is a cyclic number.

It is not a de Polignac number, because 140315281 - 2¹⁹ = 139790993 is a prime.

It is a super-2 number, since 2×140315281² = 39376756164217922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140315251) 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, 67831 + ... + 69868.

It is an arithmetic number, because the mean of its divisors is an integer number (35113500).

Almost surely, 2^140315281 is an apocalyptic number.

It is an amenable number.

140315281 is a deficient number, since it is larger than the sum of its proper divisors (138719).

140315281 is a wasteful number, since it uses less digits than its factorization.

140315281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138718.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 140315281 is about 11845.4751276595. The cubic root of 140315281 is about 519.6389024117.

The spelling of 140315281 in words is "one hundred forty million, three hundred fifteen thousand, two hundred eighty-one".