148140721 has 8 divisors (see below), whose sum is σ = 150595200. Its totient is φ = 145700880.

The previous prime is 148140659. The next prime is 148140731. The reversal of 148140721 is 127041841.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 148140721 - 2⁷ = 148140593 is a prime.

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 148140721.

It is not an unprimeable number, because it can be changed into a prime (148140731) 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 7 ways as a sum of consecutive naturals, for example, 17766 + ... + 24736.

It is an arithmetic number, because the mean of its divisors is an integer number (18824400).

Almost surely, 2^148140721 is an apocalyptic number.

It is an amenable number.

148140721 is a deficient number, since it is larger than the sum of its proper divisors (2454479).

148140721 is an equidigital number, since it uses as much as digits as its factorization.

148140721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7319.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 148140721 is about 12171.3072839363. The cubic root of 148140721 is about 529.1248414445.

The spelling of 148140721 in words is "one hundred forty-eight million, one hundred forty thousand, seven hundred twenty-one".