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130724141 = 294507729
BaseRepresentation
bin1111100101010…
…11000100101101
3100002222110210212
413302223010231
5231431133031
620545512205
73145064642
oct762530455
9302873725
10130724141
1167876a89
1237942665
1321110282
141350bdc9
15b72312b
hex7cab12d

130724141 has 4 divisors (see below), whose sum is σ = 135231900. Its totient is φ = 126216384.

The previous prime is 130724131. The next prime is 130724149. The reversal of 130724141 is 141427031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84088900 + 46635241 = 9170^2 + 6829^2 .

It is a cyclic number.

It is not a de Polignac number, because 130724141 - 214 = 130707757 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 (130724149) 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, 2253836 + ... + 2253893.

It is an arithmetic number, because the mean of its divisors is an integer number (33807975).

Almost surely, 2130724141 is an apocalyptic number.

It is an amenable number.

130724141 is a deficient number, since it is larger than the sum of its proper divisors (4507759).

130724141 is an equidigital number, since it uses as much as digits as its factorization.

130724141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507758.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 130724141 is about 11433.4658349951. The cubic root of 130724141 is about 507.5185637122.

The spelling of 130724141 in words is "one hundred thirty million, seven hundred twenty-four thousand, one hundred forty-one".

Divisors: 1 29 4507729 130724141