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BaseRepresentation
bin11111100110010…
…010010111110101
31100221112102020001
4133212102113311
52041203133141
6124334311301
716065014512
oct3746222765
91327472201
10530130421
11252276917
12129658531
1385aa4552
145059a309
153181aa31
hex1f9925f5

530130421 has 4 divisors (see below), whose sum is σ = 531452844. Its totient is φ = 528808000.

The previous prime is 530130401. The next prime is 530130479. The reversal of 530130421 is 124031035.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124031035 = 524806207.

It can be written as a sum of positive squares in 2 ways, for example, as 403567921 + 126562500 = 20089^2 + 11250^2 .

It is a cyclic number.

It is not a de Polignac number, because 530130421 - 211 = 530128373 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 (530130401) 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, 660610 + ... + 661411.

It is an arithmetic number, because the mean of its divisors is an integer number (132863211).

Almost surely, 2530130421 is an apocalyptic number.

It is an amenable number.

530130421 is a deficient number, since it is larger than the sum of its proper divisors (1322423).

530130421 is a wasteful number, since it uses less digits than its factorization.

530130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322422.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 530130421 is about 23024.5612553204. The cubic root of 530130421 is about 809.3336087935. Note that the first 3 decimals are identical.

Adding to 530130421 its reverse (124031035), we get a palindrome (654161456).

The spelling of 530130421 in words is "five hundred thirty million, one hundred thirty thousand, four hundred twenty-one".

Divisors: 1 401 1322021 530130421