491447125 has 16 divisors (see below), whose sum is σ = 660507120. Its totient is φ = 362913600.

The previous prime is 491447083. The next prime is 491447153. The reversal of 491447125 is 521744194.

It can be written as a sum of positive squares in 8 ways, for example, as 214856964 + 276590161 = 14658^2 + 16631^2 .

It is a de Polignac number, because none of the positive numbers 2^k-491447125 is a prime.

It is a super-3 number, since 3×491447125³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149590 + ... + 152839.

It is an arithmetic number, because the mean of its divisors is an integer number (41281695).

Almost surely, 2^491447125 is an apocalyptic number.

It is an amenable number.

491447125 is a deficient number, since it is larger than the sum of its proper divisors (169059995).

491447125 is a wasteful number, since it uses less digits than its factorization.

491447125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302457 (or 302447 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 491447125 is about 22168.6067446739. The cubic root of 491447125 is about 789.1488589924.

The spelling of 491447125 in words is "four hundred ninety-one million, four hundred forty-seven thousand, one hundred twenty-five".