2345729 has 2 divisors, whose sum is σ = 2345730. Its totient is φ = 2345728.

The previous prime is 2345713. The next prime is 2345731. The reversal of 2345729 is 9275432.

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., 1385329 + 960400 = 1177^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 2345729 - 2⁴ = 2345713 is a prime.

It is a Sophie Germain prime.

Together with 2345731, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is equal to p₁₇₂₅₉₈ and since 2345729 and 172598 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 2345695 and 2345704.

It is not a weakly prime, because it can be changed into another prime (2345129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1172864 + 1172865.

It is an arithmetic number, because the mean of its divisors is an integer number (1172865).

2^2345729 is an apocalyptic number.

It is an amenable number.

2345729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2345729 is an equidigital number, since it uses as much as digits as its factorization.

2345729 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2345729 is about 1531.5772915527. The cubic root of 2345729 is about 132.8696973199.

The spelling of 2345729 in words is "two million, three hundred forty-five thousand, seven hundred twenty-nine".