1461505421 has 2 divisors, whose sum is σ = 1461505422. Its totient is φ = 1461505420.

The previous prime is 1461505411. The next prime is 1461505471. The reversal of 1461505421 is 1245051641.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1150159396 + 311346025 = 33914^2 + 17645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1461505421 - 2¹⁰ = 1461504397 is a prime.

It is a super-2 number, since 2×1461505421² = 4271996191224774482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1461505411) 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, 730752710 + 730752711.

It is an arithmetic number, because the mean of its divisors is an integer number (730752711).

Almost surely, 2^1461505421 is an apocalyptic number.

It is an amenable number.

1461505421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461505421 is an equidigital number, since it uses as much as digits as its factorization.

1461505421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1461505421 is about 38229.6406077797. The cubic root of 1461505421 is about 1134.8369734861.

The spelling of 1461505421 in words is "one billion, four hundred sixty-one million, five hundred five thousand, four hundred twenty-one".