146544421 has 2 divisors, whose sum is σ = 146544422. Its totient is φ = 146544420.

The previous prime is 146544413. The next prime is 146544481. The reversal of 146544421 is 124445641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141943396 + 4601025 = 11914^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 146544421 - 2³ = 146544413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146544401) 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 as a sum of consecutive naturals, namely, 73272210 + 73272211.

It is an arithmetic number, because the mean of its divisors is an integer number (73272211).

Almost surely, 2^146544421 is an apocalyptic number.

It is an amenable number.

146544421 is a deficient number, since it is larger than the sum of its proper divisors (1).

146544421 is an equidigital number, since it uses as much as digits as its factorization.

146544421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 31.

The square root of 146544421 is about 12105.5533124265. The cubic root of 146544421 is about 527.2174340741.

The spelling of 146544421 in words is "one hundred forty-six million, five hundred forty-four thousand, four hundred twenty-one".