1421502409 has 2 divisors, whose sum is σ = 1421502410. Its totient is φ = 1421502408.

The previous prime is 1421502389. The next prime is 1421502443. The reversal of 1421502409 is 9042051241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 845646400 + 575856009 = 29080^2 + 23997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421502409 - 2⁵ = 1421502377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421502469) 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, 710751204 + 710751205.

It is an arithmetic number, because the mean of its divisors is an integer number (710751205).

Almost surely, 2^1421502409 is an apocalyptic number.

It is an amenable number.

1421502409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421502409 is an equidigital number, since it uses as much as digits as its factorization.

1421502409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1421502409 is about 37702.8169902462. The cubic root of 1421502409 is about 1124.3871319324.

The spelling of 1421502409 in words is "one billion, four hundred twenty-one million, five hundred two thousand, four hundred nine".