501361421 has 4 divisors (see below), whose sum is σ = 546939744. Its totient is φ = 455783100.

The previous prime is 501361387. The next prime is 501361423. The reversal of 501361421 is 124163105.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501361421 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 (501361423) 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, 22789145 + ... + 22789166.

It is an arithmetic number, because the mean of its divisors is an integer number (136734936).

Almost surely, 2^501361421 is an apocalyptic number.

It is an amenable number.

501361421 is a deficient number, since it is larger than the sum of its proper divisors (45578323).

501361421 is a wasteful number, since it uses less digits than its factorization.

501361421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45578322.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 501361421 is about 22391.1013797892. The cubic root of 501361421 is about 794.4202468593.

The spelling of 501361421 in words is "five hundred one million, three hundred sixty-one thousand, four hundred twenty-one".