42500525 has 6 divisors (see below), whose sum is σ = 52700682. Its totient is φ = 34000400.

The previous prime is 42500519. The next prime is 42500539. The reversal of 42500525 is 52500524.

It can be written as a sum of positive squares in 3 ways, for example, as 8988004 + 33512521 = 2998^2 + 5789^2 .

It is not a de Polignac number, because 42500525 - 2¹² = 42496429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42500525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 849986 + ... + 850035.

It is an arithmetic number, because the mean of its divisors is an integer number (8783447).

Almost surely, 2^42500525 is an apocalyptic number.

It is an amenable number.

42500525 is a deficient number, since it is larger than the sum of its proper divisors (10200157).

42500525 is a wasteful number, since it uses less digits than its factorization.

42500525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700031 (or 1700026 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 42500525 is about 6519.2426707402. The cubic root of 42500525 is about 348.9780393020.

Subtracting 42500525 from its reverse (52500524), we obtain a palindrome (9999999).

The spelling of 42500525 in words is "forty-two million, five hundred thousand, five hundred twenty-five".