157045247 has 4 divisors (see below), whose sum is σ = 157656576. Its totient is φ = 156433920.

The previous prime is 157045181. The next prime is 157045271. The reversal of 157045247 is 742540751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742540751 = 25309 ⋅29339.

It is a cyclic number.

It is not a de Polignac number, because 157045247 - 2¹² = 157041151 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 (157045547) 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 3 ways as a sum of consecutive naturals, for example, 305279 + ... + 305792.

It is an arithmetic number, because the mean of its divisors is an integer number (39414144).

Almost surely, 2^157045247 is an apocalyptic number.

157045247 is a deficient number, since it is larger than the sum of its proper divisors (611329).

157045247 is an equidigital number, since it uses as much as digits as its factorization.

157045247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611328.

The product of its (nonzero) digits is 39200, while the sum is 35.

The square root of 157045247 is about 12531.7695079346. The cubic root of 157045247 is about 539.5208907705.

Adding to 157045247 its reverse (742540751), we get a palindrome (899585998).

The spelling of 157045247 in words is "one hundred fifty-seven million, forty-five thousand, two hundred forty-seven".