650161 has 6 divisors (see below), whose sum is σ = 686562. Its totient is φ = 615600.

The previous prime is 650107. The next prime is 650179. The reversal of 650161 is 161056.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 207936 = 665^2 + 456^2 .

It is not a de Polignac number, because 650161 - 2¹³ = 641969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (650261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 540 + ... + 1261.

It is an arithmetic number, because the mean of its divisors is an integer number (114427).

2⁶⁵⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

650161 is a deficient number, since it is larger than the sum of its proper divisors (36401).

650161 is a wasteful number, since it uses less digits than its factorization.

650161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839 (or 1820 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 650161 is about 806.3256166091. The cubic root of 650161 is about 86.6310619691.

The spelling of 650161 in words is "six hundred fifty thousand, one hundred sixty-one".