140857191 has 8 divisors (see below), whose sum is σ = 208677360. Its totient is φ = 93904776.

The previous prime is 140857183. The next prime is 140857217. The reversal of 140857191 is 191758041.

It is not a de Polignac number, because 140857191 - 2³ = 140857183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140857111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2608440 + ... + 2608493.

It is an arithmetic number, because the mean of its divisors is an integer number (26084670).

Almost surely, 2^140857191 is an apocalyptic number.

140857191 is a deficient number, since it is larger than the sum of its proper divisors (67820169).

140857191 is an equidigital number, since it uses as much as digits as its factorization.

140857191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216942 (or 5216936 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 140857191 is about 11868.3272199582. The cubic root of 140857191 is about 520.3070068246.

The spelling of 140857191 in words is "one hundred forty million, eight hundred fifty-seven thousand, one hundred ninety-one".