527478421 has 4 divisors (see below), whose sum is σ = 527807052. Its totient is φ = 527149792.

The previous prime is 527478403. The next prime is 527478439. The reversal of 527478421 is 124874725.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (527478403) and next prime (527478439).

It can be written as a sum of positive squares in 2 ways, for example, as 286794225 + 240684196 = 16935^2 + 15514^2 .

It is a cyclic number.

It is not a de Polignac number, because 527478421 - 2⁷ = 527478293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (527470421) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 161896 + ... + 165121.

It is an arithmetic number, because the mean of its divisors is an integer number (131951763).

Almost surely, 2^527478421 is an apocalyptic number.

It is an amenable number.

527478421 is a deficient number, since it is larger than the sum of its proper divisors (328631).

527478421 is a wasteful number, since it uses less digits than its factorization.

527478421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328630.

The product of its digits is 125440, while the sum is 40.

The square root of 527478421 is about 22966.8983757058. The cubic root of 527478421 is about 807.9817768045.

The spelling of 527478421 in words is "five hundred twenty-seven million, four hundred seventy-eight thousand, four hundred twenty-one".