490421 has 2 divisors, whose sum is σ = 490422. Its totient is φ = 490420.
The previous prime is 490417. The next prime is 490453. The reversal of 490421 is 124094.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 483025 + 7396 = 695^2 + 86^2 .
It is a cyclic number.
It is not a de Polignac number, because 490421 - 22 = 490417 is a prime.
It is a Chen prime.
It is a nialpdrome in base 14.
It is a junction number, because it is equal to n+sod(n) for n = 490393 and 490402.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (490481) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245210 + 245211.
It is an arithmetic number, because the mean of its divisors is an integer number (245211).
2490421 is an apocalyptic number.
It is an amenable number.
490421 is a deficient number, since it is larger than the sum of its proper divisors (1).
490421 is an equidigital number, since it uses as much as digits as its factorization.
490421 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 288, while the sum is 20.
The square root of 490421 is about 700.3006497212. The cubic root of 490421 is about 78.8599237562.
The spelling of 490421 in words is "four hundred ninety thousand, four hundred twenty-one".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.067 sec. • engine limits •