148236521 has 4 divisors (see below), whose sum is σ = 148461444. Its totient is φ = 148011600.

The previous prime is 148236511. The next prime is 148236547. The reversal of 148236521 is 125632841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125632841 = 4759 ⋅26399.

It can be written as a sum of positive squares in 2 ways, for example, as 46730896 + 101505625 = 6836^2 + 10075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148236521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148236511) 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, 111470 + ... + 112791.

It is an arithmetic number, because the mean of its divisors is an integer number (37115361).

Almost surely, 2^148236521 is an apocalyptic number.

It is an amenable number.

148236521 is a deficient number, since it is larger than the sum of its proper divisors (224923).

148236521 is an equidigital number, since it uses as much as digits as its factorization.

148236521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224922.

The product of its digits is 11520, while the sum is 32.

The square root of 148236521 is about 12175.2421331159. The cubic root of 148236521 is about 529.2388754445.

The spelling of 148236521 in words is "one hundred forty-eight million, two hundred thirty-six thousand, five hundred twenty-one".