1501321501 has 2 divisors, whose sum is σ = 1501321502. Its totient is φ = 1501321500.

The previous prime is 1501321453. The next prime is 1501321531. The reversal of 1501321501 is 1051231051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1346816601 + 154504900 = 36699^2 + 12430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1501321501 - 2¹⁷ = 1501190429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1501321531) 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, 750660750 + 750660751.

It is an arithmetic number, because the mean of its divisors is an integer number (750660751).

Almost surely, 2^1501321501 is an apocalyptic number.

It is an amenable number.

1501321501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501321501 is an equidigital number, since it uses as much as digits as its factorization.

1501321501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1501321501 is about 38746.8902106995. The cubic root of 1501321501 is about 1145.0503085515.

Adding to 1501321501 its reverse (1051231051), we get a palindrome (2552552552).

The spelling of 1501321501 in words is "one billion, five hundred one million, three hundred twenty-one thousand, five hundred one".