2131245 has 16 divisors (see below), whose sum is σ = 3789120. Its totient is φ = 1136592.

The previous prime is 2131243. The next prime is 2131247. The reversal of 2131245 is 5421312.

It is an interprime number because it is at equal distance from previous prime (2131243) and next prime (2131247).

It is not a de Polignac number, because 2131245 - 2¹ = 2131243 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7759 + ... + 8028.

It is an arithmetic number, because the mean of its divisors is an integer number (236820).

2^2131245 is an apocalyptic number.

It is an amenable number.

2131245 is a deficient number, since it is larger than the sum of its proper divisors (1657875).

2131245 is a wasteful number, since it uses less digits than its factorization.

2131245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15801 (or 15795 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2131245 is about 1459.8784195953. The cubic root of 2131245 is about 128.6898987405.

Adding to 2131245 its reverse (5421312), we get a palindrome (7552557).

The spelling of 2131245 in words is "two million, one hundred thirty-one thousand, two hundred forty-five".