2742409 has 2 divisors, whose sum is σ = 2742410. Its totient is φ = 2742408.

The previous prime is 2742407. The next prime is 2742427. The reversal of 2742409 is 9042472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2732409 + 10000 = 1653^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 2742409 - 2¹ = 2742407 is a prime.

Together with 2742407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2742407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1371204 + 1371205.

It is an arithmetic number, because the mean of its divisors is an integer number (1371205).

2^2742409 is an apocalyptic number.

It is an amenable number.

2742409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2742409 is an equidigital number, since it uses as much as digits as its factorization.

2742409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 2742409 is about 1656.0220409161. The cubic root of 2742409 is about 139.9729369457.

It can be divided in two parts, 274 and 2409, that multiplied together give a palindrome (660066).

The spelling of 2742409 in words is "two million, seven hundred forty-two thousand, four hundred nine".