157140191 has 8 divisors (see below), whose sum is σ = 169493184. Its totient is φ = 144825120.

The previous prime is 157140169. The next prime is 157140227. The reversal of 157140191 is 191041751.

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 157140191 - 2²² = 152945887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157140121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 17736.

It is an arithmetic number, because the mean of its divisors is an integer number (21186648).

Almost surely, 2^157140191 is an apocalyptic number.

157140191 is a deficient number, since it is larger than the sum of its proper divisors (12352993).

157140191 is a wasteful number, since it uses less digits than its factorization.

157140191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18961.

The product of its (nonzero) digits is 1260, while the sum is 29.

The square root of 157140191 is about 12535.5570677972. The cubic root of 157140191 is about 539.6295939481.

The spelling of 157140191 in words is "one hundred fifty-seven million, one hundred forty thousand, one hundred ninety-one".