156461 has 4 divisors (see below), whose sum is σ = 158172. Its totient is φ = 154752.

The previous prime is 156437. The next prime is 156467. The reversal of 156461 is 164651.

156461 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 an emirpimes, since its reverse is a distinct semiprime: 164651 = 229 ⋅719.

It can be written as a sum of positive squares in 2 ways, for example, as 84100 + 72361 = 290^2 + 269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156461 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156467) 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, 710 + ... + 903.

It is an arithmetic number, because the mean of its divisors is an integer number (39543).

2¹⁵⁶⁴⁶¹ is an apocalyptic number.

It is an amenable number.

156461 is a deficient number, since it is larger than the sum of its proper divisors (1711).

156461 is an equidigital number, since it uses as much as digits as its factorization.

156461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710.

The product of its digits is 720, while the sum is 23.

The square root of 156461 is about 395.5515137122. The cubic root of 156461 is about 53.8851009174.

The spelling of 156461 in words is "one hundred fifty-six thousand, four hundred sixty-one".