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12501210245 = 513309187861
BaseRepresentation
bin10111010010010000…
…10101010010000101
31012021020020021112212
423221020111102011
5201100302211440
65424252153205
7621535351046
oct135110252205
935236207485
1012501210245
115335675317
12250a768805
131242c51734
1486840a8cd
154d2777465
hex2e9215485

12501210245 has 8 divisors (see below), whose sum is σ = 15002659320. Its totient is φ = 10000163520.

The previous prime is 12501210233. The next prime is 12501210289. The reversal of 12501210245 is 54201210521.

It can be written as a sum of positive squares in 4 ways, for example, as 1395844321 + 11105365924 = 37361^2 + 105382^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12501210245 - 212 = 12501206149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12501210245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27386 + ... + 160475.

It is an arithmetic number, because the mean of its divisors is an integer number (1875332415).

Almost surely, 212501210245 is an apocalyptic number.

It is an amenable number.

12501210245 is a deficient number, since it is larger than the sum of its proper divisors (2501449075).

12501210245 is a wasteful number, since it uses less digits than its factorization.

12501210245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201175.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 12501210245 its reverse (54201210521), we get a palindrome (66702420766).

The spelling of 12501210245 in words is "twelve billion, five hundred one million, two hundred ten thousand, two hundred forty-five".

Divisors: 1 5 13309 66545 187861 939305 2500242049 12501210245