6191945 has 12 divisors (see below), whose sum is σ = 7770756. Its totient is φ = 4736160.

The previous prime is 6191903. The next prime is 6191947. The reversal of 6191945 is 5491916.

It can be written as a sum of positive squares in 2 ways, for example, as 3136441 + 3055504 = 1771^2 + 1748^2 .

It is not a de Polignac number, because 6191945 - 2¹² = 6187849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6191947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1475 + ... + 3815.

It is an arithmetic number, because the mean of its divisors is an integer number (647563).

Almost surely, 2^6191945 is an apocalyptic number.

It is an amenable number.

6191945 is a deficient number, since it is larger than the sum of its proper divisors (1578811).

6191945 is a wasteful number, since it uses less digits than its factorization.

6191945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392 (or 2369 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 6191945 is about 2488.3619109768. The cubic root of 6191945 is about 183.6294626498.

The spelling of 6191945 in words is "six million, one hundred ninety-one thousand, nine hundred forty-five".