140545281 has 32 divisors (see below), whose sum is σ = 200344320. Its totient is φ = 87494400.

The previous prime is 140545247. The next prime is 140545303. The reversal of 140545281 is 182545041.

It is not a de Polignac number, because 140545281 - 2²¹ = 138448129 is a prime.

It is a super-2 number, since 2×140545281² = 39505952022737922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140545231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 376611 + ... + 376983.

It is an arithmetic number, because the mean of its divisors is an integer number (6260760).

Almost surely, 2^140545281 is an apocalyptic number.

It is an amenable number.

140545281 is a deficient number, since it is larger than the sum of its proper divisors (59799039).

140545281 is a wasteful number, since it uses less digits than its factorization.

140545281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 140545281 is about 11855.1795009608. The cubic root of 140545281 is about 519.9226721799.

The spelling of 140545281 in words is "one hundred forty million, five hundred forty-five thousand, two hundred eighty-one".