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1428471 = 321147307
BaseRepresentation
bin101011100101111110111
32200120111100
411130233313
5331202341
650341143
715066432
oct5345767
92616440
101428471
11896260
1258a7b3
133b0265
14292819
151d33b6
hex15cbf7

1428471 has 24 divisors (see below), whose sum is σ = 2306304. Its totient is φ = 844560.

The previous prime is 1428431. The next prime is 1428473. The reversal of 1428471 is 1748241.

It is not a de Polignac number, because 1428471 - 214 = 1412087 is a prime.

It is a super-3 number, since 3×14284713 = 8744511208389993333, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4500 + ... + 4806.

It is an arithmetic number, because the mean of its divisors is an integer number (96096).

21428471 is an apocalyptic number.

1428471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1428471 is a deficient number, since it is larger than the sum of its proper divisors (877833).

1428471 is a wasteful number, since it uses less digits than its factorization.

1428471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371 (or 368 counting only the distinct ones).

The product of its digits is 1792, while the sum is 27.

The square root of 1428471 is about 1195.1865963104. The cubic root of 1428471 is about 112.6221488083.

The spelling of 1428471 in words is "one million, four hundred twenty-eight thousand, four hundred seventy-one".

Divisors: 1 3 9 11 33 47 99 141 307 423 517 921 1551 2763 3377 4653 10131 14429 30393 43287 129861 158719 476157 1428471