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130661243 = 1091198727
BaseRepresentation
bin1111100100110…
…11101101111011
3100002212021112022
413302123231323
5231422124433
620544305055
73144413366
oct762335573
9302767468
10130661243
11678337a9
123791218b
13210ba75b
14134d30dd
15b70e698
hex7c9bb7b

130661243 has 4 divisors (see below), whose sum is σ = 131860080. Its totient is φ = 129462408.

The previous prime is 130661227. The next prime is 130661273. The reversal of 130661243 is 342166031.

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

It is a cyclic number.

It is not a de Polignac number, because 130661243 - 24 = 130661227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130661213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599255 + ... + 599472.

It is an arithmetic number, because the mean of its divisors is an integer number (32965020).

Almost surely, 2130661243 is an apocalyptic number.

130661243 is a deficient number, since it is larger than the sum of its proper divisors (1198837).

130661243 is a wasteful number, since it uses less digits than its factorization.

130661243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198836.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 130661243 is about 11430.7148945287. The cubic root of 130661243 is about 507.4371530320.

The spelling of 130661243 in words is "one hundred thirty million, six hundred sixty-one thousand, two hundred forty-three".

Divisors: 1 109 1198727 130661243