2125831 has 2 divisors, whose sum is σ = 2125832. Its totient is φ = 2125830.

The previous prime is 2125819. The next prime is 2125841. The reversal of 2125831 is 1385212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2125831 - 2⁷ = 2125703 is a prime.

It is a super-2 number, since 2×2125831² = 9038314881122, which contains 22 as substring.

It is an Ulam number.

2125831 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062915 + 1062916.

It is an arithmetic number, because the mean of its divisors is an integer number (1062916).

2^2125831 is an apocalyptic number.

2125831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125831 is an equidigital number, since it uses as much as digits as its factorization.

2125831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 22.

The square root of 2125831 is about 1458.0229764993. The cubic root of 2125831 is about 128.5808360547.

It can be divided in two parts, 21 and 25831, that added together give a palindrome (25852).

The spelling of 2125831 in words is "two million, one hundred twenty-five thousand, eight hundred thirty-one".