424651985 has 4 divisors (see below), whose sum is σ = 509582388. Its totient is φ = 339721584.

The previous prime is 424651949. The next prime is 424652009. The reversal of 424651985 is 589156424.

424651985 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 82882816 + 341769169 = 9104^2 + 18487^2 .

It is a cyclic number.

It is not a de Polignac number, because 424651985 - 2²⁰ = 423603409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42465194 + ... + 42465203.

It is an arithmetic number, because the mean of its divisors is an integer number (127395597).

Almost surely, 2^424651985 is an apocalyptic number.

It is an amenable number.

424651985 is a deficient number, since it is larger than the sum of its proper divisors (84930403).

424651985 is an equidigital number, since it uses as much as digits as its factorization.

424651985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84930402.

The product of its digits is 345600, while the sum is 44.

The square root of 424651985 is about 20607.0857959101. The cubic root of 424651985 is about 751.6420231305.

The spelling of 424651985 in words is "four hundred twenty-four million, six hundred fifty-one thousand, nine hundred eighty-five".