525542645 has 8 divisors (see below), whose sum is σ = 632242104. Its totient is φ = 419373504.

The previous prime is 525542627. The next prime is 525542651. The reversal of 525542645 is 546245525.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 106357969 + 419184676 = 10313^2 + 20474^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 525542645 - 2⁶ = 525542581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 525542599 and 525542608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130394 + ... + 134363.

It is an arithmetic number, because the mean of its divisors is an integer number (79030263).

Almost surely, 2^525542645 is an apocalyptic number.

It is an amenable number.

525542645 is a deficient number, since it is larger than the sum of its proper divisors (106699459).

525542645 is a wasteful number, since it uses less digits than its factorization.

525542645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265159.

The product of its digits is 240000, while the sum is 38.

The square root of 525542645 is about 22924.7169011964. The cubic root of 525542645 is about 806.9921698416.

The spelling of 525542645 in words is "five hundred twenty-five million, five hundred forty-two thousand, six hundred forty-five".