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30121255 = 525124001
BaseRepresentation
bin111001011100…
…1110100100111
32002200022121001
41302321310213
530202340010
62553334131
7514012033
oct162716447
962608531
1030121255
11160035aa
12a107347
136318238
1440011c3
15299ec3a
hex1cb9d27

30121255 has 8 divisors (see below), whose sum is σ = 36291024. Its totient is φ = 24000000.

The previous prime is 30121241. The next prime is 30121261. The reversal of 30121255 is 55212103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30121255 - 29 = 30120743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10746 + ... + 13255.

It is an arithmetic number, because the mean of its divisors is an integer number (4536378).

Almost surely, 230121255 is an apocalyptic number.

30121255 is a deficient number, since it is larger than the sum of its proper divisors (6169769).

30121255 is a wasteful number, since it uses less digits than its factorization.

30121255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24257.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 30121255 is about 5488.2834292700. The cubic root of 30121255 is about 311.1413183774.

Adding to 30121255 its reverse (55212103), we get a palindrome (85333358).

The spelling of 30121255 in words is "thirty million, one hundred twenty-one thousand, two hundred fifty-five".

Divisors: 1 5 251 1255 24001 120005 6024251 30121255