13523121 has 6 divisors (see below), whose sum is σ = 19533410. Its totient is φ = 9015408.

The previous prime is 13523119. The next prime is 13523123. The reversal of 13523121 is 12132531.

13523121 is a `hidden beast` number, since 1 + 352 + 312 + 1 = 666.

13523121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13523119) and next prime (13523123).

It can be written as a sum of positive squares in only one way, i.e., 7096896 + 6426225 = 2664^2 + 2535^2 .

It is not a de Polignac number, because 13523121 - 2¹ = 13523119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13523094 and 13523103.

It is not an unprimeable number, because it can be changed into a prime (13523123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 751276 + ... + 751293.

Almost surely, 2^13523121 is an apocalyptic number.

It is an amenable number.

13523121 is a deficient number, since it is larger than the sum of its proper divisors (6010289).

13523121 is a wasteful number, since it uses less digits than its factorization.

13523121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502575 (or 1502572 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 13523121 is about 3677.3796377312. The cubic root of 13523121 is about 238.2460147089.

Adding to 13523121 its reverse (12132531), we get a palindrome (25655652).

The spelling of 13523121 in words is "thirteen million, five hundred twenty-three thousand, one hundred twenty-one".