1225890733 has 2 divisors, whose sum is σ = 1225890734. Its totient is φ = 1225890732.

The previous prime is 1225890727. The next prime is 1225890767. The reversal of 1225890733 is 3370985221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1197021604 + 28869129 = 34598^2 + 5373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225890733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225890713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612945366 + 612945367.

It is an arithmetic number, because the mean of its divisors is an integer number (612945367).

Almost surely, 2^1225890733 is an apocalyptic number.

It is an amenable number.

1225890733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225890733 is an equidigital number, since it uses as much as digits as its factorization.

1225890733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1225890733 is about 35012.7224448485. The cubic root of 1225890733 is about 1070.2467573676.

The spelling of 1225890733 in words is "one billion, two hundred twenty-five million, eight hundred ninety thousand, seven hundred thirty-three".