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490901 = 1513251
BaseRepresentation
bin1110111110110010101
3220221101112
41313312111
5111202101
614304405
74113125
oct1676625
9827345
10490901
11305904
121b8105
13142598
14cac85
159a6bb
hex77d95

490901 has 4 divisors (see below), whose sum is σ = 494304. Its totient is φ = 487500.

The previous prime is 490891. The next prime is 490913. The reversal of 490901 is 109094.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109094 = 254547.

It is a cyclic number.

It is not a de Polignac number, because 490901 - 26 = 490837 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (123576).

2490901 is an apocalyptic number.

It is an amenable number.

490901 is a deficient number, since it is larger than the sum of its proper divisors (3403).

490901 is a wasteful number, since it uses less digits than its factorization.

490901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3402.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 490901 is about 700.6432758544. The cubic root of 490901 is about 78.8856434410.

Adding to 490901 its reverse (109094), we get a palindrome (599995).

The spelling of 490901 in words is "four hundred ninety thousand, nine hundred one".

Divisors: 1 151 3251 490901