685435145 has 8 divisors (see below), whose sum is σ = 823867656. Its totient is φ = 547451136.

The previous prime is 685435081. The next prime is 685435147. The reversal of 685435145 is 541534586.

It can be written as a sum of positive squares in 4 ways, for example, as 71436304 + 613998841 = 8452^2 + 24779^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 685435145 - 2⁶ = 685435081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685435147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108752 + ... + 114881.

It is an arithmetic number, because the mean of its divisors is an integer number (102983457).

Almost surely, 2^685435145 is an apocalyptic number.

It is an amenable number.

685435145 is a deficient number, since it is larger than the sum of its proper divisors (138432511).

685435145 is a wasteful number, since it uses less digits than its factorization.

685435145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224251.

The product of its digits is 288000, while the sum is 41.

The square root of 685435145 is about 26180.8163547281. The cubic root of 685435145 is about 881.7026029110.

The spelling of 685435145 in words is "six hundred eighty-five million, four hundred thirty-five thousand, one hundred forty-five".