526644421 has 8 divisors (see below), whose sum is σ = 541198584. Its totient is φ = 512107200.

The previous prime is 526644403. The next prime is 526644439. The reversal of 526644421 is 124446625.

It is an interprime number because it is at equal distance from previous prime (526644403) and next prime (526644439).

It can be written as a sum of positive squares in 4 ways, for example, as 171321921 + 355322500 = 13089^2 + 18850^2 .

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 526644421 - 2⁵ = 526644389 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 (526644121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83271 + ... + 89371.

It is an arithmetic number, because the mean of its divisors is an integer number (67649823).

Almost surely, 2^526644421 is an apocalyptic number.

It is an amenable number.

526644421 is a deficient number, since it is larger than the sum of its proper divisors (14554163).

526644421 is a wasteful number, since it uses less digits than its factorization.

526644421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8471.

The product of its digits is 46080, while the sum is 34.

The square root of 526644421 is about 22948.7346274255. The cubic root of 526644421 is about 807.5557168723. Note that the first 3 decimals are identical.

The spelling of 526644421 in words is "five hundred twenty-six million, six hundred forty-four thousand, four hundred twenty-one".