146012021 has 2 divisors, whose sum is σ = 146012022. Its totient is φ = 146012020.

The previous prime is 146012011. The next prime is 146012039. The reversal of 146012021 is 120210641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138909796 + 7102225 = 11786^2 + 2665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-146012021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (146012011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73006010 + 73006011.

It is an arithmetic number, because the mean of its divisors is an integer number (73006011).

Almost surely, 2^146012021 is an apocalyptic number.

It is an amenable number.

146012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

146012021 is an equidigital number, since it uses as much as digits as its factorization.

146012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 146012021 is about 12083.5433958752. The cubic root of 146012021 is about 526.5781940707.

Adding to 146012021 its reverse (120210641), we get a palindrome (266222662).

The spelling of 146012021 in words is "one hundred forty-six million, twelve thousand, twenty-one".