1521043453 has 2 divisors, whose sum is σ = 1521043454. Its totient is φ = 1521043452.

The previous prime is 1521043451. The next prime is 1521043457. The reversal of 1521043453 is 3543401251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 822657124 + 698386329 = 28682^2 + 26427^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521043453 - 2¹ = 1521043451 is a prime.

Together with 1521043451, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1521043451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760521726 + 760521727.

It is an arithmetic number, because the mean of its divisors is an integer number (760521727).

Almost surely, 2^1521043453 is an apocalyptic number.

It is an amenable number.

1521043453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521043453 is an equidigital number, since it uses as much as digits as its factorization.

1521043453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1521043453 is about 39000.5570857648. The cubic root of 1521043453 is about 1150.0424566556.

The spelling of 1521043453 in words is "one billion, five hundred twenty-one million, forty-three thousand, four hundred fifty-three".