1509421061 has 2 divisors, whose sum is σ = 1509421062. Its totient is φ = 1509421060.

The previous prime is 1509421033. The next prime is 1509421097. The reversal of 1509421061 is 1601249051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1473792100 + 35628961 = 38390^2 + 5969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1509421061 - 2¹⁰ = 1509420037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1509421861) 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, 754710530 + 754710531.

It is an arithmetic number, because the mean of its divisors is an integer number (754710531).

Almost surely, 2^1509421061 is an apocalyptic number.

It is an amenable number.

1509421061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1509421061 is an equidigital number, since it uses as much as digits as its factorization.

1509421061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1509421061 is about 38851.2684606307. The cubic root of 1509421061 is about 1147.1057810477.

The spelling of 1509421061 in words is "one billion, five hundred nine million, four hundred twenty-one thousand, sixty-one".