2131924 has 6 divisors (see below), whose sum is σ = 3730874. Its totient is φ = 1065960.

The previous prime is 2131907. The next prime is 2131937. The reversal of 2131924 is 4291312.

It can be written as a sum of positive squares in only one way, i.e., 2131600 + 324 = 1460^2 + 18^2 .

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 2131895 and 2131904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266487 + ... + 266494.

2^2131924 is an apocalyptic number.

It is an amenable number.

2131924 is a deficient number, since it is larger than the sum of its proper divisors (1598950).

2131924 is a wasteful number, since it uses less digits than its factorization.

2131924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532985 (or 532983 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 2131924 is about 1460.1109546880. The cubic root of 2131924 is about 128.7035638616.

The spelling of 2131924 in words is "two million, one hundred thirty-one thousand, nine hundred twenty-four".