1521253545 has 64 divisors (see below), whose sum is σ = 2941747200. Its totient is φ = 656524800.

The previous prime is 1521253537. The next prime is 1521253549. The reversal of 1521253545 is 5453521251.

It is not a de Polignac number, because 1521253545 - 2³ = 1521253537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1521253549) 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 63 ways as a sum of consecutive naturals, for example, 127756 + ... + 139154.

It is an arithmetic number, because the mean of its divisors is an integer number (45964800).

Almost surely, 2^1521253545 is an apocalyptic number.

1521253545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1521253545 is a deficient number, since it is larger than the sum of its proper divisors (1420493655).

1521253545 is a wasteful number, since it uses less digits than its factorization.

1521253545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11486.

The product of its digits is 30000, while the sum is 33.

The square root of 1521253545 is about 39003.2504414696. The cubic root of 1521253545 is about 1150.0954035533.

Adding to 1521253545 its reverse (5453521251), we get a palindrome (6974774796).

The spelling of 1521253545 in words is "one billion, five hundred twenty-one million, two hundred fifty-three thousand, five hundred forty-five".