519901421 has 8 divisors (see below), whose sum is σ = 566186040. Its totient is φ = 474515712.

The previous prime is 519901409. The next prime is 519901457. The reversal of 519901421 is 124109915.

It can be written as a sum of positive squares in 4 ways, for example, as 29278921 + 490622500 = 5411^2 + 22150^2 .

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 519901421 - 2¹⁰ = 519900397 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 (519901471) 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, 223520 + ... + 225833.

It is an arithmetic number, because the mean of its divisors is an integer number (70773255).

Almost surely, 2^519901421 is an apocalyptic number.

It is an amenable number.

519901421 is a deficient number, since it is larger than the sum of its proper divisors (46284619).

519901421 is a wasteful number, since it uses less digits than its factorization.

519901421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449455.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 519901421 is about 22801.3469119699. The cubic root of 519901421 is about 804.0943332340.

The spelling of 519901421 in words is "five hundred nineteen million, nine hundred one thousand, four hundred twenty-one".