147231261 has 6 divisors (see below), whose sum is σ = 212667390. Its totient is φ = 98154168.

The previous prime is 147231241. The next prime is 147231277. The reversal of 147231261 is 162132741.

It can be written as a sum of positive squares in only one way, i.e., 145805625 + 1425636 = 12075^2 + 1194^2 .

It is not a de Polignac number, because 147231261 - 2⁶ = 147231197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147231241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8179506 + ... + 8179523.

It is an arithmetic number, because the mean of its divisors is an integer number (35444565).

Almost surely, 2^147231261 is an apocalyptic number.

It is an amenable number.

147231261 is a deficient number, since it is larger than the sum of its proper divisors (65436129).

147231261 is a wasteful number, since it uses less digits than its factorization.

147231261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16359035 (or 16359032 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 147231261 is about 12133.8889479012. Note that the first 3 decimals coincide. The cubic root of 147231261 is about 528.0398235287.

The spelling of 147231261 in words is "one hundred forty-seven million, two hundred thirty-one thousand, two hundred sixty-one".