148428421 has 2 divisors, whose sum is σ = 148428422. Its totient is φ = 148428420.

The previous prime is 148428419. The next prime is 148428443. The reversal of 148428421 is 124824841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136773025 + 11655396 = 11695^2 + 3414^2 .

It is a cyclic number.

It is not a de Polignac number, because 148428421 - 2¹ = 148428419 is a prime.

Together with 148428419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148428481) 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, 74214210 + 74214211.

It is an arithmetic number, because the mean of its divisors is an integer number (74214211).

Almost surely, 2^148428421 is an apocalyptic number.

It is an amenable number.

148428421 is a deficient number, since it is larger than the sum of its proper divisors (1).

148428421 is an equidigital number, since it uses as much as digits as its factorization.

148428421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16384, while the sum is 34.

The square root of 148428421 is about 12183.1203310154. The cubic root of 148428421 is about 529.4671528525.

The spelling of 148428421 in words is "one hundred forty-eight million, four hundred twenty-eight thousand, four hundred twenty-one".