1521046453 has 4 divisors (see below), whose sum is σ = 1521252460. Its totient is φ = 1520840448.

The previous prime is 1521046451. The next prime is 1521046459. The reversal of 1521046453 is 3546401251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1197298404 + 323748049 = 34602^2 + 17993^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521046453 - 2¹ = 1521046451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521046451) 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 in 3 ways as a sum of consecutive naturals, for example, 91500 + ... + 106837.

It is an arithmetic number, because the mean of its divisors is an integer number (380313115).

Almost surely, 2^1521046453 is an apocalyptic number.

It is an amenable number.

1521046453 is a deficient number, since it is larger than the sum of its proper divisors (206007).

1521046453 is an equidigital number, since it uses as much as digits as its factorization.

1521046453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206006.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1521046453 is about 39000.5955467349. The cubic root of 1521046453 is about 1150.0432127429.

The spelling of 1521046453 in words is "one billion, five hundred twenty-one million, forty-six thousand, four hundred fifty-three".