150865721 has 2 divisors, whose sum is σ = 150865722. Its totient is φ = 150865720.

The previous prime is 150865711. The next prime is 150865739. The reversal of 150865721 is 127568051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150675625 + 190096 = 12275^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 150865721 - 2¹⁴ = 150849337 is a prime.

It is not a weakly prime, because it can be changed into another prime (150865711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75432860 + 75432861.

It is an arithmetic number, because the mean of its divisors is an integer number (75432861).

Almost surely, 2^150865721 is an apocalyptic number.

It is an amenable number.

150865721 is a deficient number, since it is larger than the sum of its proper divisors (1).

150865721 is an equidigital number, since it uses as much as digits as its factorization.

150865721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 150865721 is about 12282.7407772044. The cubic root of 150865721 is about 532.3495086352.

The spelling of 150865721 in words is "one hundred fifty million, eight hundred sixty-five thousand, seven hundred twenty-one".