501245521 has 8 divisors (see below), whose sum is σ = 580699904. Its totient is φ = 423753120.

The previous prime is 501245501. The next prime is 501245551. The reversal of 501245521 is 125542105.

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

It is not a de Polignac number, because 501245521 - 2⁵ = 501245489 is a prime.

It is a super-2 number, since 2×501245521² = 502494144645122882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501245501) 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, 489945 + ... + 490966.

It is an arithmetic number, because the mean of its divisors is an integer number (72587488).

Almost surely, 2^501245521 is an apocalyptic number.

It is an amenable number.

501245521 is a deficient number, since it is larger than the sum of its proper divisors (79454383).

501245521 is an equidigital number, since it uses as much as digits as its factorization.

501245521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980991.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 501245521 is about 22388.5131484876. The cubic root of 501245521 is about 794.3590266174.

Adding to 501245521 its reverse (125542105), we get a palindrome (626787626).

The spelling of 501245521 in words is "five hundred one million, two hundred forty-five thousand, five hundred twenty-one".