525621001 has 8 divisors (see below), whose sum is σ = 563298624. Its totient is φ = 489178800.

The previous prime is 525620987. The next prime is 525621007. The reversal of 525621001 is 100126525.

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 525621001 - 2¹⁹ = 525096713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525621007) 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, 307975 + ... + 309676.

It is an arithmetic number, because the mean of its divisors is an integer number (70412328).

Almost surely, 2^525621001 is an apocalyptic number.

It is an amenable number.

525621001 is a deficient number, since it is larger than the sum of its proper divisors (37677623).

525621001 is a wasteful number, since it uses less digits than its factorization.

525621001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617711.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 525621001 is about 22926.4258226179. The cubic root of 525621001 is about 807.0322741267.

Adding to 525621001 its reverse (100126525), we get a palindrome (625747526).

The spelling of 525621001 in words is "five hundred twenty-five million, six hundred twenty-one thousand, one".