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145711 = 197669
BaseRepresentation
bin100011100100101111
321101212201
4203210233
514130321
63042331
71144546
oct434457
9241781
10145711
119a525
12703a7
1351427
143b15d
152d291
hex2392f

145711 has 4 divisors (see below), whose sum is σ = 153400. Its totient is φ = 138024.

The previous prime is 145709. The next prime is 145721. The reversal of 145711 is 117541.

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

It is a cyclic number.

It is not a de Polignac number, because 145711 - 21 = 145709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 7669 = 145711 / (1 + 4 + 5 + 7 + 1 + 1).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3816 + ... + 3853.

It is an arithmetic number, because the mean of its divisors is an integer number (38350).

2145711 is an apocalyptic number.

145711 is a deficient number, since it is larger than the sum of its proper divisors (7689).

145711 is an equidigital number, since it uses as much as digits as its factorization.

145711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7688.

The product of its digits is 140, while the sum is 19.

The square root of 145711 is about 381.7211023771. The cubic root of 145711 is about 52.6216077426.

The spelling of 145711 in words is "one hundred forty-five thousand, seven hundred eleven".

Divisors: 1 19 7669 145711