1425781249 has 8 divisors (see below), whose sum is σ = 1453285800. Its totient is φ = 1398299136.

The previous prime is 1425781219. The next prime is 1425781277. The reversal of 1425781249 is 9421875241.

It can be written as a sum of positive squares in 4 ways, for example, as 341067024 + 1084714225 = 18468^2 + 32935^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a trimorphic number since its cube, 2898402505974960331425781249, ends in 1425781249.

It is a de Polignac number, because none of the positive numbers 2^k-1425781249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425781219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182577 + ... + 190225.

It is an arithmetic number, because the mean of its divisors is an integer number (181660725).

Almost surely, 2^1425781249 is an apocalyptic number.

It is an amenable number.

1425781249 is a deficient number, since it is larger than the sum of its proper divisors (27504551).

1425781249 is an equidigital number, since it uses as much as digits as its factorization.

1425781249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11219.

The product of its digits is 161280, while the sum is 43.

The square root of 1425781249 is about 37759.5186542413. The cubic root of 1425781249 is about 1125.5141679986.

The spelling of 1425781249 in words is "one billion, four hundred twenty-five million, seven hundred eighty-one thousand, two hundred forty-nine".