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145304297 = 295010493
BaseRepresentation
bin10001010100100…
…10101011101001
3101010102020000122
420222102223221
5244144214142
622230213025
73413031455
oct1052225351
9333366018
10145304297
11750252a6
12407b4175
1324146798
1415425665
15cb531d2
hex8a92ae9

145304297 has 4 divisors (see below), whose sum is σ = 150314820. Its totient is φ = 140293776.

The previous prime is 145304293. The next prime is 145304311. The reversal of 145304297 is 792403541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123298816 + 22005481 = 11104^2 + 4691^2 .

It is a cyclic number.

It is not a de Polignac number, because 145304297 - 22 = 145304293 is a prime.

It is a super-2 number, since 2×1453042972 = 42226677453328418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145304293) 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, 2505218 + ... + 2505275.

It is an arithmetic number, because the mean of its divisors is an integer number (37578705).

Almost surely, 2145304297 is an apocalyptic number.

It is an amenable number.

145304297 is a deficient number, since it is larger than the sum of its proper divisors (5010523).

145304297 is an equidigital number, since it uses as much as digits as its factorization.

145304297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010522.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 145304297 is about 12054.2232018492. The cubic root of 145304297 is about 525.7260364496.

The spelling of 145304297 in words is "one hundred forty-five million, three hundred four thousand, two hundred ninety-seven".

Divisors: 1 29 5010493 145304297