491144425 has 6 divisors (see below), whose sum is σ = 609019118. Its totient is φ = 392915520.

The previous prime is 491144387. The next prime is 491144429. The reversal of 491144425 is 524441194.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 80514729 + 410629696 = 8973^2 + 20264^2 .

It is not a de Polignac number, because 491144425 - 2¹⁷ = 491013353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491144429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9822864 + ... + 9822913.

Almost surely, 2^491144425 is an apocalyptic number.

It is an amenable number.

491144425 is a deficient number, since it is larger than the sum of its proper divisors (117874693).

491144425 is a wasteful number, since it uses less digits than its factorization.

491144425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19645787 (or 19645782 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 491144425 is about 22161.7784710524. The cubic root of 491144425 is about 788.9868039728.

The spelling of 491144425 in words is "four hundred ninety-one million, one hundred forty-four thousand, four hundred twenty-five".