490945 has 24 divisors (see below), whose sum is σ = 737856. Its totient is φ = 307008.

The previous prime is 490937. The next prime is 490949. The reversal of 490945 is 549094.

490945 = T₅₅ + T₅₆ + ... + T₁₄₅.

It is a happy number.

It is not a de Polignac number, because 490945 - 2³ = 490937 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

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

490945 is a modest number, since divided by 945 gives 490 as remainder.

It is not an unprimeable number, because it can be changed into a prime (490949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5874 + ... + 5956.

It is an arithmetic number, because the mean of its divisors is an integer number (30744).

2⁴⁹⁰⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

490945 is a deficient number, since it is larger than the sum of its proper divisors (246911).

490945 is a wasteful number, since it uses less digits than its factorization.

490945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 490945 is about 700.6746748670. The cubic root of 490945 is about 78.8880002398. Note that the first 3 decimals are identical.

The spelling of 490945 in words is "four hundred ninety thousand, nine hundred forty-five".