146081521 has 2 divisors, whose sum is σ = 146081522. Its totient is φ = 146081520.

The previous prime is 146081491. The next prime is 146081549. The reversal of 146081521 is 125180641.

It is an a-pointer prime, because the next prime (146081549) can be obtained adding 146081521 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100721296 + 45360225 = 10036^2 + 6735^2 .

It is an emirp because it is prime and its reverse (125180641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146081521 - 2⁵ = 146081489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 146081521.

It is not a weakly prime, because it can be changed into another prime (146081821) 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, 73040760 + 73040761.

It is an arithmetic number, because the mean of its divisors is an integer number (73040761).

Almost surely, 2^146081521 is an apocalyptic number.

It is an amenable number.

146081521 is a deficient number, since it is larger than the sum of its proper divisors (1).

146081521 is an equidigital number, since it uses as much as digits as its factorization.

146081521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 146081521 is about 12086.4188658179. The cubic root of 146081521 is about 526.6617291549.

It can be divided in two parts, 14608 and 1521, that added together give a square (16129 = 127²).

The spelling of 146081521 in words is "one hundred forty-six million, eighty-one thousand, five hundred twenty-one".