425687187 has 8 divisors (see below), whose sum is σ = 568750336. Its totient is φ = 283207752.

The previous prime is 425687177. The next prime is 425687209. The reversal of 425687187 is 781786524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 425687187 - 2²⁶ = 358578323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425687107) 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 7 ways as a sum of consecutive naturals, for example, 144223 + ... + 147144.

It is an arithmetic number, because the mean of its divisors is an integer number (71093792).

Almost surely, 2^425687187 is an apocalyptic number.

425687187 is a deficient number, since it is larger than the sum of its proper divisors (143063149).

425687187 is a wasteful number, since it uses less digits than its factorization.

425687187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291857.

The product of its digits is 752640, while the sum is 48.

The square root of 425687187 is about 20632.1881292315. The cubic root of 425687187 is about 752.2523031809.

The spelling of 425687187 in words is "four hundred twenty-five million, six hundred eighty-seven thousand, one hundred eighty-seven".