1230739 has 2 divisors, whose sum is σ = 1230740. Its totient is φ = 1230738.

The previous prime is 1230727. The next prime is 1230743. The reversal of 1230739 is 9370321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1230739 - 2⁹ = 1230227 is a prime.

It is a super-2 number, since 2×1230739² = 3029436972242, which contains 22 as substring.

1230739 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1230769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615369 + 615370.

It is an arithmetic number, because the mean of its divisors is an integer number (615370).

2^1230739 is an apocalyptic number.

1230739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230739 is an equidigital number, since it uses as much as digits as its factorization.

1230739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 1230739 is about 1109.3867675432. The cubic root of 1230739 is about 107.1655805349.

The spelling of 1230739 in words is "one million, two hundred thirty thousand, seven hundred thirty-nine".