6131920 has 20 divisors (see below), whose sum is σ = 14256900. Its totient is φ = 2452736.

The previous prime is 6131911. The next prime is 6131921. The reversal of 6131920 is 291316.

It can be written as a sum of positive squares in 2 ways, for example, as 4293184 + 1838736 = 2072^2 + 1356^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 6131891 and 6131900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6131921) 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, 38245 + ... + 38404.

It is an arithmetic number, because the mean of its divisors is an integer number (712845).

Almost surely, 2^6131920 is an apocalyptic number.

It is an amenable number.

6131920 is an abundant number, since it is smaller than the sum of its proper divisors (8124980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6131920 is a wasteful number, since it uses less digits than its factorization.

6131920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76662 (or 76656 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 6131920 is about 2476.2713906194. The cubic root of 6131920 is about 183.0341640457.

The spelling of 6131920 in words is "six million, one hundred thirty-one thousand, nine hundred twenty".