157243 has 2 divisors, whose sum is σ = 157244. Its totient is φ = 157242.

The previous prime is 157231. The next prime is 157247. The reversal of 157243 is 342751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157243 - 2⁵ = 157211 is a prime.

It is a super-2 number, since 2×157243² = 49450722098, which contains 22 as substring.

It is equal to p₁₄₄₅₈ and since 157243 and 14458 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (157247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78621 + 78622.

It is an arithmetic number, because the mean of its divisors is an integer number (78622).

2¹⁵⁷²⁴³ is an apocalyptic number.

157243 is a deficient number, since it is larger than the sum of its proper divisors (1).

157243 is an equidigital number, since it uses as much as digits as its factorization.

157243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 22.

The square root of 157243 is about 396.5387749010. The cubic root of 157243 is about 53.9747252547.

Adding to 157243 its reverse (342751), we get a palindrome (499994).

It can be divided in two parts, 157 and 243, that added together give a square (400 = 20²).

The spelling of 157243 in words is "one hundred fifty-seven thousand, two hundred forty-three".