490161 has 16 divisors (see below), whose sum is σ = 791424. Its totient is φ = 263424.

The previous prime is 490159. The next prime is 490169. The reversal of 490161 is 161094.

It is not a de Polignac number, because 490161 - 2¹ = 490159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

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

It is not an unprimeable number, because it can be changed into a prime (490169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (49464).

2⁴⁹⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

490161 is a deficient number, since it is larger than the sum of its proper divisors (301263).

490161 is a wasteful number, since it uses less digits than its factorization.

490161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 490161 is about 700.1149905551. The cubic root of 490161 is about 78.8459852526.

The spelling of 490161 in words is "four hundred ninety thousand, one hundred sixty-one".