6214991 has 4 divisors (see below), whose sum is σ = 6485232. Its totient is φ = 5944752.

The previous prime is 6214981. The next prime is 6214993. The reversal of 6214991 is 1994126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6214991 - 2¹⁸ = 5952847 is a prime.

It is a super-2 number, since 2×6214991² = 77252226260162, 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 (6214993) 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, 135086 + ... + 135131.

It is an arithmetic number, because the mean of its divisors is an integer number (1621308).

Almost surely, 2^6214991 is an apocalyptic number.

6214991 is a deficient number, since it is larger than the sum of its proper divisors (270241).

6214991 is a wasteful number, since it uses less digits than its factorization.

6214991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270240.

The product of its digits is 3888, while the sum is 32.

The square root of 6214991 is about 2492.9883674017. The cubic root of 6214991 is about 183.8569993992.

The spelling of 6214991 in words is "six million, two hundred fourteen thousand, nine hundred ninety-one".