Search a number
-
+
130421540 = 2256521077
BaseRepresentation
bin1111100011000…
…01001100100100
3100002102002201102
413301201030210
5231341442130
620535215232
73142364504
oct761411444
9302362642
10130421540
116768a6a7
1237817518
1321035612
141346da04
15b6b3645
hex7c61324

130421540 has 12 divisors (see below), whose sum is σ = 273885276. Its totient is φ = 52168608.

The previous prime is 130421531. The next prime is 130421573. The reversal of 130421540 is 45124031.

Adding to 130421540 its reverse (45124031), we get a palindrome (175545571).

It can be written as a sum of positive squares in 2 ways, for example, as 28047616 + 102373924 = 5296^2 + 10118^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6521077 = 130421540 / (1 + 3 + 0 + 4 + 2 + 1 + 5 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3260519 + ... + 3260558.

It is an arithmetic number, because the mean of its divisors is an integer number (22823773).

Almost surely, 2130421540 is an apocalyptic number.

130421540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130421540 is an abundant number, since it is smaller than the sum of its proper divisors (143463736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130421540 is a wasteful number, since it uses less digits than its factorization.

130421540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521086 (or 6521084 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 130421540 is about 11420.2250415655. The cubic root of 130421540 is about 507.1266588567.

The spelling of 130421540 in words is "one hundred thirty million, four hundred twenty-one thousand, five hundred forty".

Divisors: 1 2 4 5 10 20 6521077 13042154 26084308 32605385 65210770 130421540