157240873 has 4 divisors (see below), whose sum is σ = 157271508. Its totient is φ = 157210240.

The previous prime is 157240849. The next prime is 157240879. The reversal of 157240873 is 378042751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378042751 = 11621 ⋅32531.

It can be written as a sum of positive squares in 2 ways, for example, as 128210329 + 29030544 = 11323^2 + 5388^2 .

It is a cyclic number.

It is not a de Polignac number, because 157240873 - 2¹³ = 157232681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157240879) 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, 5536 + ... + 18577.

It is an arithmetic number, because the mean of its divisors is an integer number (39317877).

Almost surely, 2^157240873 is an apocalyptic number.

It is an amenable number.

157240873 is a deficient number, since it is larger than the sum of its proper divisors (30635).

157240873 is an equidigital number, since it uses as much as digits as its factorization.

157240873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30634.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 157240873 is about 12539.5722813818. The cubic root of 157240873 is about 539.7448188459.

The spelling of 157240873 in words is "one hundred fifty-seven million, two hundred forty thousand, eight hundred seventy-three".