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9942985 = 513198397
BaseRepresentation
bin100101111011…
…011111001001
3200201011012201
4211323133021
510021133420
6553040201
7150341203
oct45733711
920634181
109942985
115681348
1233b6061
1320a1930
14146b773
15d1610a
hex97b7c9

9942985 has 32 divisors (see below), whose sum is σ = 13829760. Its totient is φ = 6801408.

The previous prime is 9942941. The next prime is 9943057. The reversal of 9942985 is 5892499.

It is a cyclic number.

It is not a de Polignac number, because 9942985 - 29 = 9942473 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

9942985 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102457 + ... + 102553.

It is an arithmetic number, because the mean of its divisors is an integer number (432180).

Almost surely, 29942985 is an apocalyptic number.

9942985 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9942985 is the 1577-th decagonal number.

It is an amenable number.

9942985 is a deficient number, since it is larger than the sum of its proper divisors (3886775).

9942985 is a wasteful number, since it uses less digits than its factorization.

9942985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217.

The product of its digits is 233280, while the sum is 46.

The square root of 9942985 is about 3153.2499108063. The cubic root of 9942985 is about 215.0332380558.

The spelling of 9942985 in words is "nine million, nine hundred forty-two thousand, nine hundred eighty-five".

Divisors: 1 5 13 19 65 83 95 97 247 415 485 1079 1235 1261 1577 1843 5395 6305 7885 8051 9215 20501 23959 40255 102505 104663 119795 152969 523315 764845 1988597 9942985