501369421 has 6 divisors (see below), whose sum is σ = 583225710. Its totient is φ = 429745176.

The previous prime is 501369403. The next prime is 501369439. The reversal of 501369421 is 124963105.

It is an interprime number because it is at equal distance from previous prime (501369403) and next prime (501369439).

It can be written as a sum of positive squares in only one way, i.e., 467856900 + 33512521 = 21630^2 + 5789^2 .

It is not a de Polignac number, because 501369421 - 2¹⁹ = 500845133 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 (501369481) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5115966 + ... + 5116063.

It is an arithmetic number, because the mean of its divisors is an integer number (97204285).

Almost surely, 2^501369421 is an apocalyptic number.

It is an amenable number.

501369421 is a deficient number, since it is larger than the sum of its proper divisors (81856289).

501369421 is a wasteful number, since it uses less digits than its factorization.

501369421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10232043 (or 10232036 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 501369421 is about 22391.2800214726. The cubic root of 501369421 is about 794.4244722397.

The spelling of 501369421 in words is "five hundred one million, three hundred sixty-nine thousand, four hundred twenty-one".