12521475 has 72 divisors (see below), whose sum is σ = 24663600. Its totient is φ = 6048000.

The previous prime is 12521473. The next prime is 12521479. The reversal of 12521475 is 57412521.

It is not a de Polignac number, because 12521475 - 2¹ = 12521473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12521473) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 123925 + ... + 124025.

It is an arithmetic number, because the mean of its divisors is an integer number (342550).

Almost surely, 2^12521475 is an apocalyptic number.

12521475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12521475 is a deficient number, since it is larger than the sum of its proper divisors (12142125).

12521475 is a wasteful number, since it uses less digits than its factorization.

12521475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 157 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 12521475 is about 3538.5696262756. The cubic root of 12521475 is about 232.2122698037.

Adding to 12521475 its reverse (57412521), we get a palindrome (69933996).

It can be divided in two parts, 12521 and 475, that added together give a square (12996 = 114²).

The spelling of 12521475 in words is "twelve million, five hundred twenty-one thousand, four hundred seventy-five".