505098421 has 4 divisors (see below), whose sum is σ = 505585600. Its totient is φ = 504611244.

The previous prime is 505098401. The next prime is 505098437. The reversal of 505098421 is 124890505.

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 not a de Polignac number, because 505098421 - 2⁵ = 505098389 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 (505098401) 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, 242031 + ... + 244108.

It is an arithmetic number, because the mean of its divisors is an integer number (126396400).

Almost surely, 2^505098421 is an apocalyptic number.

It is an amenable number.

505098421 is a deficient number, since it is larger than the sum of its proper divisors (487179).

505098421 is a wasteful number, since it uses less digits than its factorization.

505098421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487178.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 505098421 is about 22474.3947860671. The cubic root of 505098421 is about 796.3891543667.

The spelling of 505098421 in words is "five hundred five million, ninety-eight thousand, four hundred twenty-one".