140805081 has 8 divisors (see below), whose sum is σ = 208600160. Its totient is φ = 93870036.

The previous prime is 140805079. The next prime is 140805107. The reversal of 140805081 is 180508041.

It is not a de Polignac number, because 140805081 - 2¹ = 140805079 is a prime.

It is a super-2 number, since 2×140805081² = 39652141670833122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5215003 = 140805081 / (1 + 4 + 0 + 8 + 0 + 5 + 0 + 8 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (140805061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2607475 + ... + 2607528.

It is an arithmetic number, because the mean of its divisors is an integer number (26075020).

Almost surely, 2^140805081 is an apocalyptic number.

It is an amenable number.

140805081 is a deficient number, since it is larger than the sum of its proper divisors (67795079).

140805081 is an equidigital number, since it uses as much as digits as its factorization.

140805081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215012 (or 5215006 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 140805081 is about 11866.1316780154. The cubic root of 140805081 is about 520.2428365300.

The spelling of 140805081 in words is "one hundred forty million, eight hundred five thousand, eighty-one".