140815081 has 24 divisors (see below), whose sum is σ = 161566272. Its totient is φ = 122522400.

The previous prime is 140815079. The next prime is 140815139. The reversal of 140815081 is 180518041.

It is the 4845-th star number.

It is not a de Polignac number, because 140815081 - 2¹ = 140815079 is a prime.

It is a super-2 number, since 2×140815081² = 39657774074073122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140815481) 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 23 ways as a sum of consecutive naturals, for example, 317646 + ... + 318088.

It is an arithmetic number, because the mean of its divisors is an integer number (6731928).

Almost surely, 2^140815081 is an apocalyptic number.

140815081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140815081 is a deficient number, since it is larger than the sum of its proper divisors (20751191).

140815081 is a wasteful number, since it uses less digits than its factorization.

140815081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 140815081 is about 11866.5530378455. The cubic root of 140815081 is about 520.2551521490.

The spelling of 140815081 in words is "one hundred forty million, eight hundred fifteen thousand, eighty-one".