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145139727 = 317191011483
BaseRepresentation
bin10001010011010…
…10100000001111
3101010002212021110
420221222200033
5244123432402
622222503103
73411444615
oct1051524017
9333085243
10145139727
1174a22697
1240734a93
13240b98c5
14153c16b5
15cb1e56c
hex8a6a80f

145139727 has 32 divisors (see below), whose sum is σ = 217969920. Its totient is φ = 85363200.

The previous prime is 145139723. The next prime is 145139759. The reversal of 145139727 is 727931541.

It is not a de Polignac number, because 145139727 - 22 = 145139723 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145139723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97128 + ... + 98610.

It is an arithmetic number, because the mean of its divisors is an integer number (6811560).

Almost surely, 2145139727 is an apocalyptic number.

145139727 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

145139727 is a deficient number, since it is larger than the sum of its proper divisors (72830193).

145139727 is a wasteful number, since it uses less digits than its factorization.

145139727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623.

The product of its digits is 52920, while the sum is 39.

The square root of 145139727 is about 12047.3950296319. The cubic root of 145139727 is about 525.5274843545.

The spelling of 145139727 in words is "one hundred forty-five million, one hundred thirty-nine thousand, seven hundred twenty-seven".

Divisors: 1 3 17 19 51 57 101 303 323 969 1483 1717 1919 4449 5151 5757 25211 28177 32623 75633 84531 97869 149783 449349 479009 1437027 2546311 2845877 7638933 8537631 48379909 145139727