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BaseRepresentation
bin10001010100010…
…10010101011101
3101010100111010102
420222022111131
5244142120414
622225350445
73412530005
oct1052122535
9333314112
10145270109
1175001646
1240798425
132413405a
1415417005
15cb47ede
hex8a8a55d

145270109 has 2 divisors, whose sum is σ = 145270110. Its totient is φ = 145270108.

The previous prime is 145270087. The next prime is 145270121. The reversal of 145270109 is 901072541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139169209 + 6100900 = 11797^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 145270109 - 212 = 145266013 is a prime.

It is a super-2 number, since 2×1452701092 = 42206809137743762, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145270159) 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 as a sum of consecutive naturals, namely, 72635054 + 72635055.

It is an arithmetic number, because the mean of its divisors is an integer number (72635055).

Almost surely, 2145270109 is an apocalyptic number.

It is an amenable number.

145270109 is a deficient number, since it is larger than the sum of its proper divisors (1).

145270109 is an equidigital number, since it uses as much as digits as its factorization.

145270109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 145270109 is about 12052.8050262169. The cubic root of 145270109 is about 525.6848013039.

The spelling of 145270109 in words is "one hundred forty-five million, two hundred seventy thousand, one hundred nine".