491225 has 18 divisors (see below), whose sum is σ = 710334. Its totient is φ = 336000.

The previous prime is 491219. The next prime is 491251. The reversal of 491225 is 522194.

It can be written as a sum of positive squares in 3 ways, for example, as 153664 + 337561 = 392^2 + 581^2 .

It is not a de Polignac number, because 491225 - 2⁸ = 490969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491225.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1025 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (39463).

2⁴⁹¹²²⁵ is an apocalyptic number.

It is an amenable number.

491225 is a deficient number, since it is larger than the sum of its proper divisors (219109).

491225 is a wasteful number, since it uses less digits than its factorization.

491225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 413 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 491225 is about 700.8744538075. The cubic root of 491225 is about 78.9029947518.

It can be divided in two parts, 49 and 1225, that multiplied together give a square (60025 = 245²).

The spelling of 491225 in words is "four hundred ninety-one thousand, two hundred twenty-five".