156245 has 4 divisors (see below), whose sum is σ = 187500. Its totient is φ = 124992.

The previous prime is 156241. The next prime is 156253. The reversal of 156245 is 542651.

Added to its reverse (542651) it gives a square (698896 = 836²).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542651 = 79 ⋅6869.

It can be written as a sum of positive squares in 2 ways, for example, as 78961 + 77284 = 281^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 156245 - 2² = 156241 is a prime.

It is an Ulam number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 156245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156241) 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, 15620 + ... + 15629.

It is an arithmetic number, because the mean of its divisors is an integer number (46875).

156245 is a Friedman number, since it can be written as 5^6*2*(4+1)-5, using all its digits and the basic arithmetic operations.

2¹⁵⁶²⁴⁵ is an apocalyptic number.

It is an amenable number.

156245 is a deficient number, since it is larger than the sum of its proper divisors (31255).

156245 is an equidigital number, since it uses as much as digits as its factorization.

156245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31254.

The product of its digits is 1200, while the sum is 23.

The square root of 156245 is about 395.2783829151. The cubic root of 156245 is about 53.8602927288.

Adding to 156245 its reverse (542651), we get a palindrome (698896).

The spelling of 156245 in words is "one hundred fifty-six thousand, two hundred forty-five".