140520191 has 24 divisors (see below), whose sum is σ = 169207920. Its totient is φ = 116266752.

The previous prime is 140520187. The next prime is 140520197. The reversal of 140520191 is 191025041.

It is a happy number.

140520191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140520191 - 2² = 140520187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140520197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324311 + ... + 324743.

It is an arithmetic number, because the mean of its divisors is an integer number (7050330).

Almost surely, 2^140520191 is an apocalyptic number.

140520191 is a deficient number, since it is larger than the sum of its proper divisors (28687729).

140520191 is a wasteful number, since it uses less digits than its factorization.

140520191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 140520191 is about 11854.1212664626. The cubic root of 140520191 is about 519.8917316505.

The spelling of 140520191 in words is "one hundred forty million, five hundred twenty thousand, one hundred ninety-one".