501120421 has 8 divisors (see below), whose sum is σ = 528634080. Its totient is φ = 473720688.

The previous prime is 501120419. The next prime is 501120443. The reversal of 501120421 is 124021105.

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 501120421 - 2¹ = 501120419 is a prime.

It is a super-2 number, since 2×501120421² = 502243352686434482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 501120395 and 501120404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501120821) 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, 19366 + ... + 37111.

It is an arithmetic number, because the mean of its divisors is an integer number (66079260).

Almost surely, 2^501120421 is an apocalyptic number.

It is an amenable number.

501120421 is a deficient number, since it is larger than the sum of its proper divisors (27513659).

501120421 is a wasteful number, since it uses less digits than its factorization.

501120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56963.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 501120421 is about 22385.7191307315. The cubic root of 501120421 is about 794.2929361963.

Adding to 501120421 its reverse (124021105), we get a palindrome (625141526).

The spelling of 501120421 in words is "five hundred one million, one hundred twenty thousand, four hundred twenty-one".