425840191 has 16 divisors (see below), whose sum is σ = 516070656. Its totient is φ = 343022976.

The previous prime is 425840183. The next prime is 425840203. The reversal of 425840191 is 191048524.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 425840191 - 2³ = 425840183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425843191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91380 + ... + 95926.

It is an arithmetic number, because the mean of its divisors is an integer number (32254416).

Almost surely, 2^425840191 is an apocalyptic number.

425840191 is a deficient number, since it is larger than the sum of its proper divisors (90230465).

425840191 is a wasteful number, since it uses less digits than its factorization.

425840191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 425840191 is about 20635.8956917310. The cubic root of 425840191 is about 752.3424192942.

The spelling of 425840191 in words is "four hundred twenty-five million, eight hundred forty thousand, one hundred ninety-one".