425144549 has 2 divisors, whose sum is σ = 425144550. Its totient is φ = 425144548.

The previous prime is 425144519. The next prime is 425144591. The reversal of 425144549 is 945441524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247055524 + 178089025 = 15718^2 + 13345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425144549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425144519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212572274 + 212572275.

It is an arithmetic number, because the mean of its divisors is an integer number (212572275).

Almost surely, 2^425144549 is an apocalyptic number.

It is an amenable number.

425144549 is a deficient number, since it is larger than the sum of its proper divisors (1).

425144549 is an equidigital number, since it uses as much as digits as its factorization.

425144549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 38.

The square root of 425144549 is about 20619.0336582489. The cubic root of 425144549 is about 751.9325266957.

The spelling of 425144549 in words is "four hundred twenty-five million, one hundred forty-four thousand, five hundred forty-nine".