1521053745 has 16 divisors (see below), whose sum is σ = 2446044480. Its totient is φ = 807109184.

The previous prime is 1521053701. The next prime is 1521053747. The reversal of 1521053745 is 5473501251.

It is a cyclic number.

It is not a de Polignac number, because 1521053745 - 2⁷ = 1521053617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1521053747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254415 + ... + 260324.

It is an arithmetic number, because the mean of its divisors is an integer number (152877780).

Almost surely, 2^1521053745 is an apocalyptic number.

1521053745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1521053745 is a deficient number, since it is larger than the sum of its proper divisors (924990735).

1521053745 is a wasteful number, since it uses less digits than its factorization.

1521053745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514944.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 1521053745 is about 39000.6890323748. The cubic root of 1521053745 is about 1150.0450505351.

Adding to 1521053745 its reverse (5473501251), we get a palindrome (6994554996).

The spelling of 1521053745 in words is "one billion, five hundred twenty-one million, fifty-three thousand, seven hundred forty-five".