2131542 has 32 divisors (see below), whose sum is σ = 5414400. Its totient is φ = 608904.

The previous prime is 2131541. The next prime is 2131559. The reversal of 2131542 is 2451312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131541) 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, 2442 + ... + 3197.

It is an arithmetic number, because the mean of its divisors is an integer number (169200).

2^2131542 is an apocalyptic number.

2131542 is an abundant number, since it is smaller than the sum of its proper divisors (3282858).

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

2131542 is a wasteful number, since it uses less digits than its factorization.

2131542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657 (or 5651 counting only the distinct ones).

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

The square root of 2131542 is about 1459.9801368512. The cubic root of 2131542 is about 128.6958763302.

Adding to 2131542 its reverse (2451312), we get a palindrome (4582854).

The spelling of 2131542 in words is "two million, one hundred thirty-one thousand, five hundred forty-two".