Base | Representation |
---|---|
bin | 100101011110000… |
… | …0011010010011100 |
3 | 10020121202020010110 |
4 | 1022330003102130 |
5 | 10033324143332 |
6 | 324431210020 |
7 | 43104333441 |
oct | 11274032234 |
9 | 3217666113 |
10 | 1257256092 |
11 | 595763124 |
12 | 2b1076910 |
13 | 170620521 |
14 | bcd959c8 |
15 | 7559a4cc |
hex | 4af0349c |
1257256092 has 12 divisors (see below), whose sum is σ = 2933597576. Its totient is φ = 419085360.
The previous prime is 1257256081. The next prime is 1257256093. The reversal of 1257256092 is 2906527521.
It is a tau number, because it is divible by the number of its divisors (12).
It is a super-2 number, since 2×12572560922 = 3161385761742224928, which contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 1257256092.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1257256093) 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, 52385659 + ... + 52385682.
Almost surely, 21257256092 is an apocalyptic number.
1257256092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
It is an amenable number.
1257256092 is an abundant number, since it is smaller than the sum of its proper divisors (1676341484).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1257256092 is a wasteful number, since it uses less digits than its factorization.
1257256092 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 104771348 (or 104771346 counting only the distinct ones).
The product of its (nonzero) digits is 75600, while the sum is 39.
The square root of 1257256092 is about 35457.8072080043. The cubic root of 1257256092 is about 1079.2976949799.
The spelling of 1257256092 in words is "one billion, two hundred fifty-seven million, two hundred fifty-six thousand, ninety-two".
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