2131574 has 4 divisors (see below), whose sum is σ = 3197364. Its totient is φ = 1065786.

The previous prime is 2131573. The next prime is 2131601. The reversal of 2131574 is 4751312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532892 + ... + 532895.

It is an arithmetic number, because the mean of its divisors is an integer number (799341).

2^2131574 is an apocalyptic number.

2131574 is a deficient number, since it is larger than the sum of its proper divisors (1065790).

2131574 is a wasteful number, since it uses less digits than its factorization.

2131574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065789.

The product of its digits is 840, while the sum is 23.

The square root of 2131574 is about 1459.9910958633. The cubic root of 2131574 is about 128.6965203471.

Adding to 2131574 its reverse (4751312), we get a palindrome (6882886).

The spelling of 2131574 in words is "two million, one hundred thirty-one thousand, five hundred seventy-four".