148451721 has 16 divisors (see below), whose sum is σ = 216205248. Its totient is φ = 89856000.

The previous prime is 148451663. The next prime is 148451741. The reversal of 148451721 is 127154841.

It is not a de Polignac number, because 148451721 - 2⁶ = 148451657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (148451741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28521 + ... + 33321.

It is an arithmetic number, because the mean of its divisors is an integer number (13512828).

Almost surely, 2^148451721 is an apocalyptic number.

148451721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

148451721 is a deficient number, since it is larger than the sum of its proper divisors (67753527).

148451721 is a wasteful number, since it uses less digits than its factorization.

148451721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5752.

The product of its digits is 8960, while the sum is 33.

The square root of 148451721 is about 12184.0765345594. The cubic root of 148451721 is about 529.4948563052.

The spelling of 148451721 in words is "one hundred forty-eight million, four hundred fifty-one thousand, seven hundred twenty-one".