148518721 has 12 divisors (see below), whose sum is σ = 161274240. Its totient is φ = 136709040.

The previous prime is 148518701. The next prime is 148518739. The reversal of 148518721 is 127815841.

It is not a de Polignac number, because 148518721 - 2⁷ = 148518593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148518701) 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 11 ways as a sum of consecutive naturals, for example, 71820 + ... + 73858.

It is an arithmetic number, because the mean of its divisors is an integer number (13439520).

Almost surely, 2^148518721 is an apocalyptic number.

It is an amenable number.

148518721 is a deficient number, since it is larger than the sum of its proper divisors (12755519).

148518721 is a wasteful number, since it uses less digits than its factorization.

148518721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496 (or 2483 counting only the distinct ones).

The product of its digits is 17920, while the sum is 37.

The square root of 148518721 is about 12186.8257146806. The cubic root of 148518721 is about 529.5745024451.

The spelling of 148518721 in words is "one hundred forty-eight million, five hundred eighteen thousand, seven hundred twenty-one".