148309021 has 8 divisors (see below), whose sum is σ = 173438144. Its totient is φ = 124165440.

The previous prime is 148308983. The next prime is 148309027. The reversal of 148309021 is 120903841.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 148309021 - 2¹⁷ = 148177949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148309027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246060 + ... + 246661.

It is an arithmetic number, because the mean of its divisors is an integer number (21679768).

Almost surely, 2^148309021 is an apocalyptic number.

It is an amenable number.

148309021 is a deficient number, since it is larger than the sum of its proper divisors (25129123).

148309021 is an equidigital number, since it uses as much as digits as its factorization.

148309021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492771.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 148309021 is about 12178.2191226796. The cubic root of 148309021 is about 529.3251420059.

The spelling of 148309021 in words is "one hundred forty-eight million, three hundred nine thousand, twenty-one".