153445 has 4 divisors (see below), whose sum is σ = 184140. Its totient is φ = 122752.

The previous prime is 153443. The next prime is 153449. The reversal of 153445 is 544351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544351 = 683 ⋅797.

It can be written as a sum of positive squares in 2 ways, for example, as 116964 + 36481 = 342^2 + 191^2 .

It is a cyclic number.

It is not a de Polignac number, because 153445 - 2¹ = 153443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153443) 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, 15340 + ... + 15349.

It is an arithmetic number, because the mean of its divisors is an integer number (46035).

2¹⁵³⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

153445 is a deficient number, since it is larger than the sum of its proper divisors (30695).

153445 is an equidigital number, since it uses as much as digits as its factorization.

153445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30694.

The product of its digits is 1200, while the sum is 22.

The square root of 153445 is about 391.7205636675. The cubic root of 153445 is about 53.5366156890.

Adding to 153445 its reverse (544351), we get a palindrome (697796).

The spelling of 153445 in words is "one hundred fifty-three thousand, four hundred forty-five".