2569421 has 2 divisors, whose sum is σ = 2569422. Its totient is φ = 2569420.

The previous prime is 2569393. The next prime is 2569423. The reversal of 2569421 is 1249652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1999396 + 570025 = 1414^2 + 755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2569421 is a prime.

Together with 2569423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2569423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1284710 + 1284711.

It is an arithmetic number, because the mean of its divisors is an integer number (1284711).

2^2569421 is an apocalyptic number.

It is an amenable number.

2569421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2569421 is an equidigital number, since it uses as much as digits as its factorization.

2569421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 2569421 is about 1602.9413588775. The cubic root of 2569421 is about 136.9656795057.

The spelling of 2569421 in words is "two million, five hundred sixty-nine thousand, four hundred twenty-one".