147555421 has 6 divisors (see below), whose sum is σ = 159779130. Its totient is φ = 136204848.

The previous prime is 147555413. The next prime is 147555437. The reversal of 147555421 is 124555741.

It can be written as a sum of positive squares in 3 ways, for example, as 5707321 + 141848100 = 2389^2 + 11910^2 .

It is not a de Polignac number, because 147555421 - 2³ = 147555413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147555521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 436386 + ... + 436723.

It is an arithmetic number, because the mean of its divisors is an integer number (26629855).

Almost surely, 2^147555421 is an apocalyptic number.

It is an amenable number.

147555421 is a deficient number, since it is larger than the sum of its proper divisors (12223709).

147555421 is an equidigital number, since it uses as much as digits as its factorization.

147555421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873135 (or 873122 counting only the distinct ones).

The product of its digits is 28000, while the sum is 34.

The square root of 147555421 is about 12147.2392336695. The cubic root of 147555421 is about 528.4270690088.

The spelling of 147555421 in words is "one hundred forty-seven million, five hundred fifty-five thousand, four hundred twenty-one".