146867521 has 2 divisors, whose sum is σ = 146867522. Its totient is φ = 146867520.

The previous prime is 146867519. The next prime is 146867537. The reversal of 146867521 is 125768641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144865296 + 2002225 = 12036^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 146867521 - 2¹ = 146867519 is a prime.

Together with 146867519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (146867561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73433760 + 73433761.

It is an arithmetic number, because the mean of its divisors is an integer number (73433761).

Almost surely, 2^146867521 is an apocalyptic number.

It is an amenable number.

146867521 is a deficient number, since it is larger than the sum of its proper divisors (1).

146867521 is an equidigital number, since it uses as much as digits as its factorization.

146867521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 146867521 is about 12118.8910796327. The cubic root of 146867521 is about 527.6046179598.

The spelling of 146867521 in words is "one hundred forty-six million, eight hundred sixty-seven thousand, five hundred twenty-one".