3153985 has 4 divisors (see below), whose sum is σ = 3784788. Its totient is φ = 2523184.

The previous prime is 3153961. The next prime is 3153989. The reversal of 3153985 is 5893513.

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 2461761 + 692224 = 1569^2 + 832^2 .

It is a cyclic number.

It is not a de Polignac number, because 3153985 - 2²¹ = 1056833 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 3153985.

It is not an unprimeable number, because it can be changed into a prime (3153989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315394 + ... + 315403.

It is an arithmetic number, because the mean of its divisors is an integer number (946197).

Almost surely, 2^3153985 is an apocalyptic number.

It is an amenable number.

3153985 is a deficient number, since it is larger than the sum of its proper divisors (630803).

3153985 is an equidigital number, since it uses as much as digits as its factorization.

3153985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630802.

The product of its digits is 16200, while the sum is 34.

The square root of 3153985 is about 1775.9462266634. The cubic root of 3153985 is about 146.6515107158.

It can be divided in two parts, 31 and 53985, that multiplied together give a triangular number (1673535 = T₁₈₂₉).

The spelling of 3153985 in words is "three million, one hundred fifty-three thousand, nine hundred eighty-five".