1225046789 has 2 divisors, whose sum is σ = 1225046790. Its totient is φ = 1225046788.

The previous prime is 1225046777. The next prime is 1225046791. The reversal of 1225046789 is 9876405221.

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., 786353764 + 438693025 = 28042^2 + 20945^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225046789 - 2⁴ = 1225046773 is a prime.

Together with 1225046791, 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 (1225046729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612523394 + 612523395.

It is an arithmetic number, because the mean of its divisors is an integer number (612523395).

Almost surely, 2^1225046789 is an apocalyptic number.

It is an amenable number.

1225046789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225046789 is an equidigital number, since it uses as much as digits as its factorization.

1225046789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1225046789 is about 35000.6684079033. The cubic root of 1225046789 is about 1070.0011031520.

The spelling of 1225046789 in words is "one billion, two hundred twenty-five million, forty-six thousand, seven hundred eighty-nine".