2131469 has 2 divisors, whose sum is σ = 2131470. Its totient is φ = 2131468.

The previous prime is 2131463. The next prime is 2131483. The reversal of 2131469 is 9641312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1408969 + 722500 = 1187^2 + 850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131469 is a prime.

It is a super-2 number, since 2×2131469² = 9086320195922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131463) 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, 1065734 + 1065735.

It is an arithmetic number, because the mean of its divisors is an integer number (1065735).

2^2131469 is an apocalyptic number.

It is an amenable number.

2131469 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131469 is an equidigital number, since it uses as much as digits as its factorization.

2131469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 2131469 is about 1459.9551362970. The cubic root of 2131469 is about 128.6944071424.

The spelling of 2131469 in words is "two million, one hundred thirty-one thousand, four hundred sixty-nine".