140656157 has 4 divisors (see below), whose sum is σ = 140694720. Its totient is φ = 140617596.

The previous prime is 140656121. The next prime is 140656163. The reversal of 140656157 is 751656041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751656041 = 313 ⋅2401457.

It is a cyclic number.

It is not a de Polignac number, because 140656157 - 2²⁴ = 123878941 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 (140650157) 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 3 ways as a sum of consecutive naturals, for example, 13163 + ... + 21320.

It is an arithmetic number, because the mean of its divisors is an integer number (35173680).

Almost surely, 2^140656157 is an apocalyptic number.

It is an amenable number.

140656157 is a deficient number, since it is larger than the sum of its proper divisors (38563).

140656157 is an equidigital number, since it uses as much as digits as its factorization.

140656157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38562.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 140656157 is about 11859.8548473411. The cubic root of 140656157 is about 520.0593583620.

The spelling of 140656157 in words is "one hundred forty million, six hundred fifty-six thousand, one hundred fifty-seven".