148452391 has 4 divisors (see below), whose sum is σ = 148479552. Its totient is φ = 148425232.

The previous prime is 148452341. The next prime is 148452407. The reversal of 148452391 is 193254841.

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

It is a cyclic number.

It is not a de Polignac number, because 148452391 - 2⁹ = 148451879 is a prime.

It is a super-2 number, since 2×148452391² = 44076224787233762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 148452391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148452341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206 + ... + 17371.

It is an arithmetic number, because the mean of its divisors is an integer number (37119888).

Almost surely, 2^148452391 is an apocalyptic number.

148452391 is a deficient number, since it is larger than the sum of its proper divisors (27161).

148452391 is an equidigital number, since it uses as much as digits as its factorization.

148452391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27160.

The product of its digits is 34560, while the sum is 37.

The square root of 148452391 is about 12184.1040294311. The cubic root of 148452391 is about 529.4956528852.

The spelling of 148452391 in words is "one hundred forty-eight million, four hundred fifty-two thousand, three hundred ninety-one".