148959721 has 4 divisors (see below), whose sum is σ = 148984132. Its totient is φ = 148935312.

The previous prime is 148959709. The next prime is 148959737. The reversal of 148959721 is 127959841.

148959721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 127959841 = 2621 ⋅48821.

It can be written as a sum of positive squares in 2 ways, for example, as 33698025 + 115261696 = 5805^2 + 10736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148959721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148959751) 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, 6031 + ... + 18283.

It is an arithmetic number, because the mean of its divisors is an integer number (37246033).

Almost surely, 2^148959721 is an apocalyptic number.

It is an amenable number.

148959721 is a deficient number, since it is larger than the sum of its proper divisors (24411).

148959721 is a wasteful number, since it uses less digits than its factorization.

148959721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24410.

The product of its digits is 181440, while the sum is 46.

The square root of 148959721 is about 12204.9056120889. The cubic root of 148959721 is about 530.0981436856.

The spelling of 148959721 in words is "one hundred forty-eight million, nine hundred fifty-nine thousand, seven hundred twenty-one".