148874221 has 4 divisors (see below), whose sum is σ = 151314844. Its totient is φ = 146433600.

The previous prime is 148874203. The next prime is 148874227. The reversal of 148874221 is 122478841.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7502121 + 141372100 = 2739^2 + 11890^2 .

It is a cyclic number.

It is not a de Polignac number, because 148874221 - 2¹¹ = 148872173 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 (148874227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220220 + ... + 1220341.

It is an arithmetic number, because the mean of its divisors is an integer number (37828711).

Almost surely, 2^148874221 is an apocalyptic number.

It is an amenable number.

148874221 is a deficient number, since it is larger than the sum of its proper divisors (2440623).

148874221 is an equidigital number, since it uses as much as digits as its factorization.

148874221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440622.

The product of its digits is 28672, while the sum is 37.

The square root of 148874221 is about 12201.4024193943. The cubic root of 148874221 is about 529.9967022460.

The spelling of 148874221 in words is "one hundred forty-eight million, eight hundred seventy-four thousand, two hundred twenty-one".