501421307 has 4 divisors (see below), whose sum is σ = 530916696. Its totient is φ = 471925920.

The previous prime is 501421301. The next prime is 501421309. The reversal of 501421307 is 703124105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 703124105 = 5 ⋅140624821.

It is a cyclic number.

It is not a de Polignac number, because 501421307 - 2⁶ = 501421243 is a prime.

It is a super-2 number, since 2×501421307² = 502846654227176498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501421301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14747669 + ... + 14747702.

It is an arithmetic number, because the mean of its divisors is an integer number (132729174).

Almost surely, 2^501421307 is an apocalyptic number.

501421307 is a deficient number, since it is larger than the sum of its proper divisors (29495389).

501421307 is a wasteful number, since it uses less digits than its factorization.

501421307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29495388.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 501421307 is about 22392.4386121744. The cubic root of 501421307 is about 794.4518759096.

The spelling of 501421307 in words is "five hundred one million, four hundred twenty-one thousand, three hundred seven".