491525001 has 12 divisors (see below), whose sum is σ = 774524400. Its totient is φ = 297893880.

The previous prime is 491524991. The next prime is 491525011. The reversal of 491525001 is 100525194.

491525001 is a `hidden beast` number, since 4 + 9 + 152 + 500 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (491524991) and next prime (491525011).

It is not a de Polignac number, because 491525001 - 2¹¹ = 491522953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491525011) 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 11 ways as a sum of consecutive naturals, for example, 2482351 + ... + 2482548.

It is an arithmetic number, because the mean of its divisors is an integer number (64543700).

Almost surely, 2^491525001 is an apocalyptic number.

It is an amenable number.

491525001 is a deficient number, since it is larger than the sum of its proper divisors (282999399).

491525001 is a wasteful number, since it uses less digits than its factorization.

491525001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4964916 (or 4964913 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 491525001 is about 22170.3631228719. The cubic root of 491525001 is about 789.1905403232.

The spelling of 491525001 in words is "four hundred ninety-one million, five hundred twenty-five thousand, one".