3126985 has 4 divisors (see below), whose sum is σ = 3752388. Its totient is φ = 2501584.

The previous prime is 3126979. The next prime is 3127009. The reversal of 3126985 is 5896213.

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 473344 + 2653641 = 688^2 + 1629^2 .

It is a cyclic number.

It is not a de Polignac number, because 3126985 - 2⁷ = 3126857 is a prime.

It is an Ulam number.

It is a Duffinian number.

3126985 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3126985.

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, 312694 + ... + 312703.

It is an arithmetic number, because the mean of its divisors is an integer number (938097).

Almost surely, 2^3126985 is an apocalyptic number.

It is an amenable number.

3126985 is a deficient number, since it is larger than the sum of its proper divisors (625403).

3126985 is an equidigital number, since it uses as much as digits as its factorization.

3126985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625402.

The product of its digits is 12960, while the sum is 34.

The square root of 3126985 is about 1768.3283066218. The cubic root of 3126985 is about 146.2318359597.

The spelling of 3126985 in words is "three million, one hundred twenty-six thousand, nine hundred eighty-five".