158461 has 4 divisors (see below), whose sum is σ = 159424. Its totient is φ = 157500.

The previous prime is 158449. The next prime is 158489. The reversal of 158461 is 164851.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 164851 = 353 ⋅467.

It is a cyclic number.

It is not a de Polignac number, because 158461 - 2⁵ = 158429 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 (158161) 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, 165 + ... + 586.

It is an arithmetic number, because the mean of its divisors is an integer number (39856).

2¹⁵⁸⁴⁶¹ is an apocalyptic number.

It is an amenable number.

158461 is a deficient number, since it is larger than the sum of its proper divisors (963).

158461 is an equidigital number, since it uses as much as digits as its factorization.

158461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

The product of its digits is 960, while the sum is 25.

The square root of 158461 is about 398.0716015995. The cubic root of 158461 is about 54.1137292143.

The spelling of 158461 in words is "one hundred fifty-eight thousand, four hundred sixty-one".