13191425 has 24 divisors (see below), whose sum is σ = 18108216. Its totient is φ = 9469440.

The previous prime is 13191421. The next prime is 13191449. The reversal of 13191425 is 52419131.

It is a Cunningham number, because it is equal to 3632²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 4376464 + 8814961 = 2092^2 + 2969^2 .

It is not a de Polignac number, because 13191425 - 2² = 13191421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13191394 and 13191403.

It is not an unprimeable number, because it can be changed into a prime (13191421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11477 + ... + 12573.

It is an arithmetic number, because the mean of its divisors is an integer number (754509).

Almost surely, 2^13191425 is an apocalyptic number.

It is an amenable number.

13191425 is a deficient number, since it is larger than the sum of its proper divisors (4916791).

13191425 is a wasteful number, since it uses less digits than its factorization.

13191425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1152 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 13191425 is about 3632.0001376652. Note that the first 3 decimals coincide. The cubic root of 13191425 is about 236.2819633321.

It can be divided in two parts, 1319 and 1425, that added together give a cube (2744 = 14³).

The spelling of 13191425 in words is "thirteen million, one hundred ninety-one thousand, four hundred twenty-five".