140100861 has 16 divisors (see below), whose sum is σ = 189097920. Its totient is φ = 92257920.

The previous prime is 140100853. The next prime is 140100881. The reversal of 140100861 is 168001041.

140100861 is nontrivially palindromic in base 9.

It is not a de Polignac number, because 140100861 - 2³ = 140100853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140100841) 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, 183721 + ... + 184481.

It is an arithmetic number, because the mean of its divisors is an integer number (11818620).

Almost surely, 2^140100861 is an apocalyptic number.

It is an amenable number.

140100861 is a deficient number, since it is larger than the sum of its proper divisors (48997059).

140100861 is a wasteful number, since it uses less digits than its factorization.

140100861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 140100861 is about 11836.4209539877. The cubic root of 140100861 is about 519.3740755254.

The spelling of 140100861 in words is "one hundred forty million, one hundred thousand, eight hundred sixty-one".