157606249 has 4 divisors (see below), whose sum is σ = 160190020. Its totient is φ = 155022480.

The previous prime is 157606247. The next prime is 157606291. The reversal of 157606249 is 942606751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942606751 = 3727 ⋅252913.

It can be written as a sum of positive squares in 2 ways, for example, as 35105625 + 122500624 = 5925^2 + 11068^2 .

It is a cyclic number.

It is not a de Polignac number, because 157606249 - 2¹ = 157606247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157606243) 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, 1291794 + ... + 1291915.

It is an arithmetic number, because the mean of its divisors is an integer number (40047505).

Almost surely, 2^157606249 is an apocalyptic number.

It is an amenable number.

157606249 is a deficient number, since it is larger than the sum of its proper divisors (2583771).

157606249 is an equidigital number, since it uses as much as digits as its factorization.

157606249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583770.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 157606249 is about 12554.1327458331. The cubic root of 157606249 is about 540.1625585125.

The spelling of 157606249 in words is "one hundred fifty-seven million, six hundred six thousand, two hundred forty-nine".