158541247 has 4 divisors (see below), whose sum is σ = 159057976. Its totient is φ = 158024520.

The previous prime is 158541239. The next prime is 158541281. The reversal of 158541247 is 742145851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742145851 = 137 ⋅5417123.

It is a cyclic number.

It is not a de Polignac number, because 158541247 - 2³ = 158541239 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 (158547247) 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, 257904 + ... + 258517.

It is an arithmetic number, because the mean of its divisors is an integer number (39764494).

Almost surely, 2^158541247 is an apocalyptic number.

158541247 is a deficient number, since it is larger than the sum of its proper divisors (516729).

158541247 is an equidigital number, since it uses as much as digits as its factorization.

158541247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516728.

The product of its digits is 44800, while the sum is 37.

The square root of 158541247 is about 12591.3163330924. The cubic root of 158541247 is about 541.2286233773.

The spelling of 158541247 in words is "one hundred fifty-eight million, five hundred forty-one thousand, two hundred forty-seven".