140471281 has 16 divisors (see below), whose sum is σ = 149489280. Its totient is φ = 131725440.

The previous prime is 140471263. The next prime is 140471293. The reversal of 140471281 is 182174041.

It is a cyclic number.

It is not a de Polignac number, because 140471281 - 2⁵ = 140471249 is a prime.

It is a super-2 number, since 2×140471281² = 39464361571561922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140471231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333451 + ... + 333871.

It is an arithmetic number, because the mean of its divisors is an integer number (9343080).

Almost surely, 2^140471281 is an apocalyptic number.

It is an amenable number.

140471281 is a deficient number, since it is larger than the sum of its proper divisors (9017999).

140471281 is a wasteful number, since it uses less digits than its factorization.

140471281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 140471281 is about 11852.0580913190. The cubic root of 140471281 is about 519.8314061434.

The spelling of 140471281 in words is "one hundred forty million, four hundred seventy-one thousand, two hundred eighty-one".