147445421 has 2 divisors, whose sum is σ = 147445422. Its totient is φ = 147445420.

The previous prime is 147445351. The next prime is 147445447. The reversal of 147445421 is 124544741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76650025 + 70795396 = 8755^2 + 8414^2 .

It is a cyclic number.

It is not a de Polignac number, because 147445421 - 2¹⁸ = 147183277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147445121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73722710 + 73722711.

It is an arithmetic number, because the mean of its divisors is an integer number (73722711).

Almost surely, 2^147445421 is an apocalyptic number.

It is an amenable number.

147445421 is a deficient number, since it is larger than the sum of its proper divisors (1).

147445421 is an equidigital number, since it uses as much as digits as its factorization.

147445421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17920, while the sum is 32.

The square root of 147445421 is about 12142.7106117209. The cubic root of 147445421 is about 528.2957253021.

The spelling of 147445421 in words is "one hundred forty-seven million, four hundred forty-five thousand, four hundred twenty-one".