148840021 has 8 divisors (see below), whose sum is σ = 167609088. Its totient is φ = 130944000.

The previous prime is 148840019. The next prime is 148840039. The reversal of 148840021 is 120048841.

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

It is not a de Polignac number, because 148840021 - 2¹ = 148840019 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 (148840051) 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, 217900 + ... + 218581.

It is an arithmetic number, because the mean of its divisors is an integer number (20951136).

Almost surely, 2^148840021 is an apocalyptic number.

148840021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

148840021 is a deficient number, since it is larger than the sum of its proper divisors (18769067).

148840021 is a wasteful number, since it uses less digits than its factorization.

148840021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436523.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 148840021 is about 12200.0008606557. Note that the first 3 decimals coincide. The cubic root of 148840021 is about 529.9561147952.

Adding to 148840021 its reverse (120048841), we get a palindrome (268888862).

The spelling of 148840021 in words is "one hundred forty-eight million, eight hundred forty thousand, twenty-one".