6131945 has 8 divisors (see below), whose sum is σ = 7424136. Its totient is φ = 4861696.

The previous prime is 6131921. The next prime is 6131947. The reversal of 6131945 is 5491316.

It can be written as a sum of positive squares in 4 ways, for example, as 1369 + 6130576 = 37^2 + 2476^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6131945 - 2¹⁴ = 6115561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6131947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4862 + ... + 5991.

It is an arithmetic number, because the mean of its divisors is an integer number (928017).

Almost surely, 2^6131945 is an apocalyptic number.

It is an amenable number.

6131945 is a deficient number, since it is larger than the sum of its proper divisors (1292191).

6131945 is a wasteful number, since it uses less digits than its factorization.

6131945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10971.

The product of its digits is 3240, while the sum is 29.

The square root of 6131945 is about 2476.2764385262. The cubic root of 6131945 is about 183.0344127904.

The spelling of 6131945 in words is "six million, one hundred thirty-one thousand, nine hundred forty-five".