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140287 = 73409
BaseRepresentation
bin100010001111111111
321010102211
4202033333
513442122
63001251
71123000
oct421777
9233384
10140287
1196444
1269227
134bb14
14391a7
152b877
hex223ff

140287 has 8 divisors (see below), whose sum is σ = 164000. Its totient is φ = 119952.

The previous prime is 140281. The next prime is 140297. The reversal of 140287 is 782041.

It is not a de Polignac number, because 140287 - 27 = 140159 is a prime.

It is a Duffinian number.

140287 is a lucky number.

It is a plaindrome in base 16.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (20500).

2140287 is an apocalyptic number.

140287 is a deficient number, since it is larger than the sum of its proper divisors (23713).

140287 is an frugal number, since it uses more digits than its factorization.

140287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 140287 is about 374.5490622068. The cubic root of 140287 is about 51.9603988431.

The spelling of 140287 in words is "one hundred forty thousand, two hundred eighty-seven".

Divisors: 1 7 49 343 409 2863 20041 140287