150724721 has 8 divisors (see below), whose sum is σ = 172440960. Its totient is φ = 129054528.

The previous prime is 150724699. The next prime is 150724751. The reversal of 150724721 is 127427051.

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 150724721 - 2⁶ = 150724657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150724751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4181 + ... + 17858.

It is an arithmetic number, because the mean of its divisors is an integer number (21555120).

Almost surely, 2^150724721 is an apocalyptic number.

It is an amenable number.

150724721 is a deficient number, since it is larger than the sum of its proper divisors (21716239).

150724721 is an equidigital number, since it uses as much as digits as its factorization.

150724721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23023.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 150724721 is about 12276.9996741875. Note that the first 3 decimals coincide. The cubic root of 150724721 is about 532.1836112694.

The spelling of 150724721 in words is "one hundred fifty million, seven hundred twenty-four thousand, seven hundred twenty-one".