147121 has 4 divisors (see below), whose sum is σ = 158452. Its totient is φ = 135792.

The previous prime is 147107. The next prime is 147137. The reversal of 147121 is 121741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121741 = 53 ⋅2297.

It can be written as a sum of positive squares in 2 ways, for example, as 90000 + 57121 = 300^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 147121 - 2⁵ = 147089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 147095 and 147104.

It is not an unprimeable number, because it can be changed into a prime (147151) 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, 5646 + ... + 5671.

It is an arithmetic number, because the mean of its divisors is an integer number (39613).

2¹⁴⁷¹²¹ is an apocalyptic number.

It is an amenable number.

147121 is a deficient number, since it is larger than the sum of its proper divisors (11331).

147121 is a wasteful number, since it uses less digits than its factorization.

147121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11330.

The product of its digits is 56, while the sum is 16.

The square root of 147121 is about 383.5635540559. The cubic root of 147121 is about 52.7907974856.

Adding to 147121 its reverse (121741), we get a palindrome (268862).

The spelling of 147121 in words is "one hundred forty-seven thousand, one hundred twenty-one", and thus it is an iban number.