12521525145 has 16 divisors (see below), whose sum is σ = 20333463360. Its totient is φ = 6578472384.

The previous prime is 12521525143. The next prime is 12521525213. The reversal of 12521525145 is 54152512521.

It is not a de Polignac number, because 12521525145 - 2¹ = 12521525143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12521525143) 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, 6228610 + ... + 6230619.

It is an arithmetic number, because the mean of its divisors is an integer number (1270841460).

Almost surely, 2^12521525145 is an apocalyptic number.

12521525145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12521525145 is a deficient number, since it is larger than the sum of its proper divisors (7811938215).

12521525145 is a wasteful number, since it uses less digits than its factorization.

12521525145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12459304.

The product of its digits is 20000, while the sum is 33.

The spelling of 12521525145 in words is "twelve billion, five hundred twenty-one million, five hundred twenty-five thousand, one hundred forty-five".