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13126129 = 36232
BaseRepresentation
bin110010000100…
…100111110001
3220200212122221
4302010213301
511330014004
61145201041
7216366412
oct62044761
926625587
1013126129
117455945
124490181
132947753
141a59809
151244354
hexc849f1

13126129 has 3 divisors (see below), whose sum is σ = 13129753. Its totient is φ = 13122506.

The previous prime is 13126121. The next prime is 13126147. The reversal of 13126129 is 92162131.

The square root of 13126129 is 3623.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 13126129 - 23 = 13126121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13126121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1812 + ... + 5434.

Almost surely, 213126129 is an apocalyptic number.

13126129 is the 3623-rd square number.

13126129 is the 1812-nd centered octagonal number.

It is an amenable number.

13126129 is a deficient number, since it is larger than the sum of its proper divisors (3624).

13126129 is an frugal number, since it uses more digits than its factorization.

13126129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7246 (or 3623 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

The cubic root of 13126129 is about 235.8914623476.

Multiplying 13126129 by its sum of digits (25), we get a square (328153225 = 181152).

The spelling of 13126129 in words is "thirteen million, one hundred twenty-six thousand, one hundred twenty-nine".

Divisors: 1 3623 13126129