130434021 has 12 divisors (see below), whose sum is σ = 188679660. Its totient is φ = 86829120.

The previous prime is 130433999. The next prime is 130434041. The reversal of 130434021 is 120434031.

130434021 is a `hidden beast` number, since 1 + 304 + 340 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 62964225 + 67469796 = 7935^2 + 8214^2 .

It is not a de Polignac number, because 130434021 - 2¹³ = 130425829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130433985 and 130434003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130434041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3840 + ... + 16601.

It is an arithmetic number, because the mean of its divisors is an integer number (15723305).

Almost surely, 2^130434021 is an apocalyptic number.

It is an amenable number.

130434021 is a deficient number, since it is larger than the sum of its proper divisors (58245639).

130434021 is a wasteful number, since it uses less digits than its factorization.

130434021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21156 (or 21153 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 130434021 is about 11420.7714713149. The cubic root of 130434021 is about 507.1428352387.

Adding to 130434021 its reverse (120434031), we get a palindrome (250868052).

The spelling of 130434021 in words is "one hundred thirty million, four hundred thirty-four thousand, twenty-one".