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15030042 = 232505007
BaseRepresentation
bin111001010101…
…011100011010
31001021121100020
4321111130122
512321430132
61254051310
7241516236
oct71253432
931247306
1015030042
118536325
125049b36
133163221
141dd35c6
1514bd52c
hexe5571a

15030042 has 8 divisors (see below), whose sum is σ = 30060096. Its totient is φ = 5010012.

The previous prime is 15030019. The next prime is 15030049. The reversal of 15030042 is 24003051.

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

15030042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (15030049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252498 + ... + 1252509.

It is an arithmetic number, because the mean of its divisors is an integer number (3757512).

Almost surely, 215030042 is an apocalyptic number.

15030042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15030042 is a wasteful number, since it uses less digits than its factorization.

15030042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505012.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 15030042 is about 3876.8598117549. The cubic root of 15030042 is about 246.7857419567.

Adding to 15030042 its reverse (24003051), we get a palindrome (39033093).

The spelling of 15030042 in words is "fifteen million, thirty thousand, forty-two".

Divisors: 1 2 3 6 2505007 5010014 7515021 15030042