157128071 has 4 divisors (see below), whose sum is σ = 157179000. Its totient is φ = 157077144.

The previous prime is 157128067. The next prime is 157128089. The reversal of 157128071 is 170821751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157128071 - 2² = 157128067 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 (157128371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20516 + ... + 27113.

It is an arithmetic number, because the mean of its divisors is an integer number (39294750).

Almost surely, 2^157128071 is an apocalyptic number.

157128071 is a deficient number, since it is larger than the sum of its proper divisors (50929).

157128071 is an equidigital number, since it uses as much as digits as its factorization.

157128071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50928.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 157128071 is about 12535.0736336090. The cubic root of 157128071 is about 539.6157199697.

The spelling of 157128071 in words is "one hundred fifty-seven million, one hundred twenty-eight thousand, seventy-one".