148390021 has 8 divisors (see below), whose sum is σ = 160763904. Its totient is φ = 136153200.

The previous prime is 148390009. The next prime is 148390037. The reversal of 148390021 is 120093841.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 148390021 - 2⁷ = 148389893 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 (148390051) 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, 32005 + ... + 36346.

It is an arithmetic number, because the mean of its divisors is an integer number (20095488).

Almost surely, 2^148390021 is an apocalyptic number.

It is an amenable number.

148390021 is a deficient number, since it is larger than the sum of its proper divisors (12373883).

148390021 is a wasteful number, since it uses less digits than its factorization.

148390021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68531.

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

The square root of 148390021 is about 12181.5442781283. The cubic root of 148390021 is about 529.4214893331.

The spelling of 148390021 in words is "one hundred forty-eight million, three hundred ninety thousand, twenty-one".