43542525 has 96 divisors (see below), whose sum is σ = 85494528. Its totient is φ = 19353600.

The previous prime is 43542523. The next prime is 43542581. The reversal of 43542525 is 52524534.

It is not a de Polignac number, because 43542525 - 2¹ = 43542523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43542492 and 43542501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43542523) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 613240 + ... + 613310.

It is an arithmetic number, because the mean of its divisors is an integer number (890568).

Almost surely, 2^43542525 is an apocalyptic number.

It is an amenable number.

43542525 is a deficient number, since it is larger than the sum of its proper divisors (41952003).

43542525 is a wasteful number, since it uses less digits than its factorization.

43542525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 146 counting only the distinct ones).

The product of its digits is 24000, while the sum is 30.

The square root of 43542525 is about 6598.6760035631. The cubic root of 43542525 is about 351.8070487154.

Subtracting 43542525 from its reverse (52524534), we obtain a square (8982009 = 2997²).

The spelling of 43542525 in words is "forty-three million, five hundred forty-two thousand, five hundred twenty-five".