2131065 has 48 divisors (see below), whose sum is σ = 4043520. Its totient is φ = 1034880.

The previous prime is 2131049. The next prime is 2131081. The reversal of 2131065 is 5601312.

It is an interprime number because it is at equal distance from previous prime (2131049) and next prime (2131081).

It is not a de Polignac number, because 2131065 - 2⁴ = 2131049 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29980 + ... + 30050.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2^2131065 is an apocalyptic number.

It is an amenable number.

2131065 is a deficient number, since it is larger than the sum of its proper divisors (1912455).

2131065 is a wasteful number, since it uses less digits than its factorization.

2131065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2131065 is about 1459.8167693242. The cubic root of 2131065 is about 128.6862756885.

Adding to 2131065 its reverse (5601312), we get a palindrome (7732377).

The spelling of 2131065 in words is "two million, one hundred thirty-one thousand, sixty-five".