146518921 has 2 divisors, whose sum is σ = 146518922. Its totient is φ = 146518920.

The previous prime is 146518913. The next prime is 146518943. The reversal of 146518921 is 129815641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95824521 + 50694400 = 9789^2 + 7120^2 .

It is an emirp because it is prime and its reverse (129815641) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 146518921 - 2³ = 146518913 is a prime.

It is a super-2 number, since 2×146518921² = 42935588422008482, which contains 22 as substring.

It is the 12105-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (146518961) by changing a digit.

It is a nontrivial repunit in base 12104.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73259460 + 73259461.

It is an arithmetic number, because the mean of its divisors is an integer number (73259461).

Almost surely, 2^146518921 is an apocalyptic number.

It is an amenable number.

146518921 is a deficient number, since it is larger than the sum of its proper divisors (1).

146518921 is an equidigital number, since it uses as much as digits as its factorization.

146518921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 37.

The square root of 146518921 is about 12104.5000309802. The cubic root of 146518921 is about 527.1868521651.

The spelling of 146518921 in words is "one hundred forty-six million, five hundred eighteen thousand, nine hundred twenty-one".