140120891 has 8 divisors (see below), whose sum is σ = 141739104. Its totient is φ = 138507840.

The previous prime is 140120867. The next prime is 140120909. The reversal of 140120891 is 198021041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140120891 - 2¹⁴ = 140104507 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 140120891.

It is not an unprimeable number, because it can be changed into a prime (140120191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83735 + ... + 85391.

It is an arithmetic number, because the mean of its divisors is an integer number (17717388).

Almost surely, 2^140120891 is an apocalyptic number.

140120891 is a deficient number, since it is larger than the sum of its proper divisors (1618213).

140120891 is a wasteful number, since it uses less digits than its factorization.

140120891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 140120891 is about 11837.2670410023. The cubic root of 140120891 is about 519.3988257111.

The spelling of 140120891 in words is "one hundred forty million, one hundred twenty thousand, eight hundred ninety-one".