148658021 has 2 divisors, whose sum is σ = 148658022. Its totient is φ = 148658020.

The previous prime is 148658011. The next prime is 148658077. The reversal of 148658021 is 120856841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84897796 + 63760225 = 9214^2 + 7985^2 .

It is a cyclic number.

It is not a de Polignac number, because 148658021 - 2¹⁴ = 148641637 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 (148658011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74329010 + 74329011.

It is an arithmetic number, because the mean of its divisors is an integer number (74329011).

Almost surely, 2^148658021 is an apocalyptic number.

It is an amenable number.

148658021 is a deficient number, since it is larger than the sum of its proper divisors (1).

148658021 is an equidigital number, since it uses as much as digits as its factorization.

148658021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 148658021 is about 12192.5395631919. The cubic root of 148658021 is about 529.7400184512.

The spelling of 148658021 in words is "one hundred forty-eight million, six hundred fifty-eight thousand, twenty-one".