140544857 has 4 divisors (see below), whose sum is σ = 141158820. Its totient is φ = 139930896.

The previous prime is 140544829. The next prime is 140544863. The reversal of 140544857 is 758445041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758445041 = 4021 ⋅188621.

It can be written as a sum of positive squares in 2 ways, for example, as 135396496 + 5148361 = 11636^2 + 2269^2 .

It is a cyclic number.

It is not a de Polignac number, because 140544857 - 2¹² = 140540761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140544857.

It is not an unprimeable number, because it can be changed into a prime (140544557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306638 + ... + 307095.

It is an arithmetic number, because the mean of its divisors is an integer number (35289705).

Almost surely, 2^140544857 is an apocalyptic number.

It is an amenable number.

140544857 is a deficient number, since it is larger than the sum of its proper divisors (613963).

140544857 is an equidigital number, since it uses as much as digits as its factorization.

140544857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613962.

The product of its (nonzero) digits is 89600, while the sum is 38.

The square root of 140544857 is about 11855.1616184681. The cubic root of 140544857 is about 519.9221493414.

Adding to 140544857 its reverse (758445041), we get a palindrome (898989898).

The spelling of 140544857 in words is "one hundred forty million, five hundred forty-four thousand, eight hundred fifty-seven".