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145007851 = 2118292
BaseRepresentation
bin10001010010010…
…10010011101011
3101002212011101011
420221022103223
5244110222401
622220004351
73410355262
oct1051122353
9332764334
10145007851
11749425aa
12406906b7
1324071881
14153895d9
15cae5451
hex8a4a4eb

145007851 has 6 divisors (see below), whose sum is σ = 145871052. Its totient is φ = 144146520.

The previous prime is 145007839. The next prime is 145007879. The reversal of 145007851 is 158700541.

It is not a de Polignac number, because 145007851 - 29 = 145007339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145005851) 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 5 ways as a sum of consecutive naturals, for example, 174505 + ... + 175333.

It is an arithmetic number, because the mean of its divisors is an integer number (24311842).

Almost surely, 2145007851 is an apocalyptic number.

145007851 is a deficient number, since it is larger than the sum of its proper divisors (863201).

145007851 is an frugal number, since it uses more digits than its factorization.

145007851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1869 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 145007851 is about 12041.9205694108. The cubic root of 145007851 is about 525.3682688985.

The spelling of 145007851 in words is "one hundred forty-five million, seven thousand, eight hundred fifty-one".

Divisors: 1 211 829 174919 687241 145007851