1225757389 has 2 divisors, whose sum is σ = 1225757390. Its totient is φ = 1225757388.

The previous prime is 1225757369. The next prime is 1225757473. The reversal of 1225757389 is 9837575221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 878233225 + 347524164 = 29635^2 + 18642^2 .

It is an emirp because it is prime and its reverse (9837575221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225757389 - 2⁷ = 1225757261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225757369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612878694 + 612878695.

It is an arithmetic number, because the mean of its divisors is an integer number (612878695).

Almost surely, 2^1225757389 is an apocalyptic number.

It is an amenable number.

1225757389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225757389 is an equidigital number, since it uses as much as digits as its factorization.

1225757389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 49.

The square root of 1225757389 is about 35010.8181709597. The cubic root of 1225757389 is about 1070.2079512559.

The spelling of 1225757389 in words is "one billion, two hundred twenty-five million, seven hundred fifty-seven thousand, three hundred eighty-nine".