2543729 has 2 divisors, whose sum is σ = 2543730. Its totient is φ = 2543728.

The previous prime is 2543719. The next prime is 2543747. The reversal of 2543729 is 9273452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 1151329 = 1180^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543729 - 2¹² = 2539633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2543695 and 2543704.

It is not a weakly prime, because it can be changed into another prime (2543719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271864 + 1271865.

It is an arithmetic number, because the mean of its divisors is an integer number (1271865).

2^2543729 is an apocalyptic number.

It is an amenable number.

2543729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543729 is an equidigital number, since it uses as much as digits as its factorization.

2543729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 2543729 is about 1594.9072073321. The cubic root of 2543729 is about 136.5076364211.

The spelling of 2543729 in words is "two million, five hundred forty-three thousand, seven hundred twenty-nine".