3013781 has 4 divisors (see below), whose sum is σ = 3077952. Its totient is φ = 2949612.

The previous prime is 3013753. The next prime is 3013783. The reversal of 3013781 is 1873103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1873103 = 743 ⋅2521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3013781 is a prime.

It is a super-2 number, since 2×3013781² = 18165751831922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3013783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32015 + ... + 32108.

It is an arithmetic number, because the mean of its divisors is an integer number (769488).

Almost surely, 2^3013781 is an apocalyptic number.

It is an amenable number.

3013781 is a deficient number, since it is larger than the sum of its proper divisors (64171).

3013781 is an equidigital number, since it uses as much as digits as its factorization.

3013781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64170.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 3013781 is about 1736.0244813942. The cubic root of 3013781 is about 144.4454601945.

Adding to 3013781 its reverse (1873103), we get a palindrome (4886884).

The spelling of 3013781 in words is "three million, thirteen thousand, seven hundred eighty-one".