140478081 has 16 divisors (see below), whose sum is σ = 195686400. Its totient is φ = 89534160.

The previous prime is 140478067. The next prime is 140478109. The reversal of 140478081 is 180874041.

It is not a de Polignac number, because 140478081 - 2⁵ = 140478049 is a prime.

It is a super-2 number, since 2×140478081² = 39468182482885122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140470081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1381 + ... + 16818.

It is an arithmetic number, because the mean of its divisors is an integer number (12230400).

Almost surely, 2^140478081 is an apocalyptic number.

It is an amenable number.

140478081 is a deficient number, since it is larger than the sum of its proper divisors (55208319).

140478081 is a wasteful number, since it uses less digits than its factorization.

140478081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18316.

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 140478081 is about 11852.3449578554. The cubic root of 140478081 is about 519.8397940893.

The spelling of 140478081 in words is "one hundred forty million, four hundred seventy-eight thousand, eighty-one".