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145497291 = 3311564487
BaseRepresentation
bin10001010110000…
…01110011001011
3101010210000202120
420223001303023
5244221403131
622234302323
73414464232
oct1053016313
9333700676
10145497291
11751472a5
12408879a3
13241b3594
1415475b19
15cb90496
hex8ac1ccb

145497291 has 8 divisors (see below), whose sum is σ = 200254464. Its totient is φ = 93869160.

The previous prime is 145497227. The next prime is 145497299. The reversal of 145497291 is 192794541.

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

It is not a de Polignac number, because 145497291 - 26 = 145497227 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (145497299) 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 7 ways as a sum of consecutive naturals, for example, 782151 + ... + 782336.

It is an arithmetic number, because the mean of its divisors is an integer number (25031808).

Almost surely, 2145497291 is an apocalyptic number.

145497291 is a deficient number, since it is larger than the sum of its proper divisors (54757173).

145497291 is a wasteful number, since it uses less digits than its factorization.

145497291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564521.

The product of its digits is 90720, while the sum is 42.

The square root of 145497291 is about 12062.2257896294. The cubic root of 145497291 is about 525.9586909204.

The spelling of 145497291 in words is "one hundred forty-five million, four hundred ninety-seven thousand, two hundred ninety-one".

Divisors: 1 3 31 93 1564487 4693461 48499097 145497291