150706721 has 4 divisors (see below), whose sum is σ = 164407344. Its totient is φ = 137006100.

The previous prime is 150706667. The next prime is 150706729. The reversal of 150706721 is 127607051.

150706721 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 Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 150706721 - 2⁶ = 150706657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150706729) 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, 6850295 + ... + 6850316.

It is an arithmetic number, because the mean of its divisors is an integer number (41101836).

Almost surely, 2^150706721 is an apocalyptic number.

150706721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

150706721 is a deficient number, since it is larger than the sum of its proper divisors (13700623).

150706721 is a wasteful number, since it uses less digits than its factorization.

150706721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13700622.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 150706721 is about 12276.2665741666. The cubic root of 150706721 is about 532.1624254362.

The spelling of 150706721 in words is "one hundred fifty million, seven hundred six thousand, seven hundred twenty-one".