13542420025 has 24 divisors (see below), whose sum is σ = 17055437400. Its totient is φ = 10665661440.

The previous prime is 13542420013. The next prime is 13542420097. The reversal of 13542420025 is 52002424531.

It can be written as a sum of positive squares in 12 ways, for example, as 11074615696 + 2467804329 = 105236^2 + 49677^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13542420025 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13542419975 and 13542420002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404839 + ... + 437011.

It is an arithmetic number, because the mean of its divisors is an integer number (710643225).

Almost surely, 2^13542420025 is an apocalyptic number.

It is an amenable number.

13542420025 is a deficient number, since it is larger than the sum of its proper divisors (3513017375).

13542420025 is a wasteful number, since it uses less digits than its factorization.

13542420025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32445 (or 32440 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 13542420025 its reverse (52002424531), we get a palindrome (65544844556).

The spelling of 13542420025 in words is "thirteen billion, five hundred forty-two million, four hundred twenty thousand, twenty-five".