6311861 has 4 divisors (see below), whose sum is σ = 6335424. Its totient is φ = 6288300.

The previous prime is 6311807. The next prime is 6311873. The reversal of 6311861 is 1681136.

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.

It is a cyclic number.

It is not a de Polignac number, because 6311861 - 2¹⁸ = 6049717 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 6311861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6311801) 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, 11375 + ... + 11916.

It is an arithmetic number, because the mean of its divisors is an integer number (1583856).

Almost surely, 2^6311861 is an apocalyptic number.

It is an amenable number.

6311861 is a deficient number, since it is larger than the sum of its proper divisors (23563).

6311861 is a wasteful number, since it uses less digits than its factorization.

6311861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23562.

The product of its digits is 864, while the sum is 26.

The square root of 6311861 is about 2512.3417363090. The cubic root of 6311861 is about 184.8073084977.

Adding to 6311861 its reverse (1681136), we get a palindrome (7992997).

The spelling of 6311861 in words is "six million, three hundred eleven thousand, eight hundred sixty-one".