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42007287 = 379532099
BaseRepresentation
bin1010000000111…
…1101011110111
32221001012011110
42200033223313
541223213122
64100210103
71020025140
oct240175367
987035143
1042007287
1121791773
1212099933
13891a3aa
145816ac7
153a4b90c
hex280faf7

42007287 has 16 divisors (see below), whose sum is σ = 64108800. Its totient is φ = 23967552.

The previous prime is 42007279. The next prime is 42007291. The reversal of 42007287 is 78270024.

It is not a de Polignac number, because 42007287 - 23 = 42007279 is a prime.

It is a super-2 number, since 2×420072872 = 3529224322200738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42007267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18964 + ... + 21062.

It is an arithmetic number, because the mean of its divisors is an integer number (4006800).

Almost surely, 242007287 is an apocalyptic number.

42007287 is a deficient number, since it is larger than the sum of its proper divisors (22101513).

42007287 is a wasteful number, since it uses less digits than its factorization.

42007287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 42007287 is about 6481.3028782800. The cubic root of 42007287 is about 347.6227663469.

The spelling of 42007287 in words is "forty-two million, seven thousand, two hundred eighty-seven".

Divisors: 1 3 7 21 953 2099 2859 6297 6671 14693 20013 44079 2000347 6001041 14002429 42007287