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130415261 = 636720483
BaseRepresentation
bin1111100010111…
…11101010011101
3100002101210002212
413301133222131
5231341242021
620535130205
73142340264
oct761375235
9302353085
10130415261
1167685a09
1237813965
13210327c2
141346b5db
15b6b185b
hex7c5fa9d

130415261 has 4 divisors (see below), whose sum is σ = 130442112. Its totient is φ = 130388412.

The previous prime is 130415251. The next prime is 130415287. The reversal of 130415261 is 162514031.

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 a de Polignac number, because none of the positive numbers 2k-130415261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130415251) 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, 3875 + ... + 16608.

It is an arithmetic number, because the mean of its divisors is an integer number (32610528).

Almost surely, 2130415261 is an apocalyptic number.

It is an amenable number.

130415261 is a deficient number, since it is larger than the sum of its proper divisors (26851).

130415261 is an equidigital number, since it uses as much as digits as its factorization.

130415261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26850.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 130415261 is about 11419.9501312396. The cubic root of 130415261 is about 507.1185203764.

Adding to 130415261 its reverse (162514031), we get a palindrome (292929292).

The spelling of 130415261 in words is "one hundred thirty million, four hundred fifteen thousand, two hundred sixty-one".

Divisors: 1 6367 20483 130415261