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161449 = 179497
BaseRepresentation
bin100111011010101001
322012110121
4213122221
520131244
63243241
71241461
oct473251
9265417
10161449
11100332
1279521
1358642
1442ba1
1532c84
hex276a9

161449 has 4 divisors (see below), whose sum is σ = 170964. Its totient is φ = 151936.

The previous prime is 161411. The next prime is 161453. The reversal of 161449 is 944161.

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 59049 + 102400 = 243^2 + 320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-161449 is a prime.

It is an Ulam number.

It is a hungry number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161459) 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, 4732 + ... + 4765.

It is an arithmetic number, because the mean of its divisors is an integer number (42741).

2161449 is an apocalyptic number.

It is an amenable number.

161449 is a deficient number, since it is larger than the sum of its proper divisors (9515).

161449 is an equidigital number, since it uses as much as digits as its factorization.

161449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9514.

The product of its digits is 864, while the sum is 25.

The square root of 161449 is about 401.8071676812. The cubic root of 161449 is about 54.4517430479.

The spelling of 161449 in words is "one hundred sixty-one thousand, four hundred forty-nine".

Divisors: 1 17 9497 161449