425446987 has 4 divisors (see below), whose sum is σ = 486225136. Its totient is φ = 364668840.

The previous prime is 425446969. The next prime is 425446991. The reversal of 425446987 is 789644524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 425446987 - 2¹⁵ = 425414219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 425446987.

It is not an unprimeable number, because it can be changed into a prime (425446937) 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 3 ways as a sum of consecutive naturals, for example, 30389064 + ... + 30389077.

It is an arithmetic number, because the mean of its divisors is an integer number (121556284).

Almost surely, 2^425446987 is an apocalyptic number.

425446987 is a deficient number, since it is larger than the sum of its proper divisors (60778149).

425446987 is an equidigital number, since it uses as much as digits as its factorization.

425446987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60778148.

The product of its digits is 1935360, while the sum is 49.

The square root of 425446987 is about 20626.3663062596. The cubic root of 425446987 is about 752.1107869022.

The spelling of 425446987 in words is "four hundred twenty-five million, four hundred forty-six thousand, nine hundred eighty-seven".