158742289 has 4 divisors (see below), whose sum is σ = 163863040. Its totient is φ = 153621540.

The previous prime is 158742281. The next prime is 158742293. The reversal of 158742289 is 982247851.

158742289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158742289 - 2³ = 158742281 is a prime.

It is a super-2 number, since 2×158742289² = 50398228633919042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158742281) 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, 2560329 + ... + 2560390.

It is an arithmetic number, because the mean of its divisors is an integer number (40965760).

Almost surely, 2^158742289 is an apocalyptic number.

It is an amenable number.

158742289 is a deficient number, since it is larger than the sum of its proper divisors (5120751).

158742289 is an equidigital number, since it uses as much as digits as its factorization.

158742289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120750.

The product of its digits is 322560, while the sum is 46.

The square root of 158742289 is about 12599.2971629373. The cubic root of 158742289 is about 541.4572993558.

The spelling of 158742289 in words is "one hundred fifty-eight million, seven hundred forty-two thousand, two hundred eighty-nine".