72090525 has 24 divisors (see below), whose sum is σ = 128359840. Its totient is φ = 35490240.

The previous prime is 72090517. The next prime is 72090559. The reversal of 72090525 is 52509027.

It is a happy number.

It is not a de Polignac number, because 72090525 - 2³ = 72090517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72090492 and 72090501.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35995 + ... + 37944.

Almost surely, 2^72090525 is an apocalyptic number.

72090525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72090525 is a deficient number, since it is larger than the sum of its proper divisors (56269315).

72090525 is a wasteful number, since it uses less digits than its factorization.

72090525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73965 (or 73960 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 72090525 is about 8490.6139353995. The cubic root of 72090525 is about 416.1910430616.

The spelling of 72090525 in words is "seventy-two million, ninety thousand, five hundred twenty-five".