1421530549 has 2 divisors, whose sum is σ = 1421530550. Its totient is φ = 1421530548.

The previous prime is 1421530427. The next prime is 1421530589. The reversal of 1421530549 is 9450351241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851180625 + 570349924 = 29175^2 + 23882^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421530549 - 2¹⁷ = 1421399477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421530589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710765274 + 710765275.

It is an arithmetic number, because the mean of its divisors is an integer number (710765275).

Almost surely, 2^1421530549 is an apocalyptic number.

It is an amenable number.

1421530549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421530549 is an equidigital number, since it uses as much as digits as its factorization.

1421530549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1421530549 is about 37703.1901700639. The cubic root of 1421530549 is about 1124.3945513230.

The spelling of 1421530549 in words is "one billion, four hundred twenty-one million, five hundred thirty thousand, five hundred forty-nine".