150345721 has 2 divisors, whose sum is σ = 150345722. Its totient is φ = 150345720.

The previous prime is 150345703. The next prime is 150345743. The reversal of 150345721 is 127543051.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118026496 + 32319225 = 10864^2 + 5685^2 .

It is a cyclic number.

It is not a de Polignac number, because 150345721 - 2¹¹ = 150343673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 150345721.

It is not a weakly prime, because it can be changed into another prime (150345751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75172860 + 75172861.

It is an arithmetic number, because the mean of its divisors is an integer number (75172861).

Almost surely, 2^150345721 is an apocalyptic number.

It is an amenable number.

150345721 is a deficient number, since it is larger than the sum of its proper divisors (1).

150345721 is an equidigital number, since it uses as much as digits as its factorization.

150345721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 150345721 is about 12261.5545914864. The cubic root of 150345721 is about 531.7371751411.

Adding to 150345721 its reverse (127543051), we get a palindrome (277888772).

The spelling of 150345721 in words is "one hundred fifty million, three hundred forty-five thousand, seven hundred twenty-one".