1425644263 has 4 divisors (see below), whose sum is σ = 1474804440. Its totient is φ = 1376484088.

The previous prime is 1425644261. The next prime is 1425644267. The reversal of 1425644263 is 3624465241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3624465241 = 811 ⋅4469131.

It is a cyclic number.

It is not a de Polignac number, because 1425644263 - 2¹ = 1425644261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425644261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24580045 + ... + 24580102.

It is an arithmetic number, because the mean of its divisors is an integer number (368701110).

Almost surely, 2^1425644263 is an apocalyptic number.

1425644263 is a deficient number, since it is larger than the sum of its proper divisors (49160177).

1425644263 is an equidigital number, since it uses as much as digits as its factorization.

1425644263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49160176.

The product of its digits is 138240, while the sum is 37.

The square root of 1425644263 is about 37757.7046839450. The cubic root of 1425644263 is about 1125.4781211829.

The spelling of 1425644263 in words is "one billion, four hundred twenty-five million, six hundred forty-four thousand, two hundred sixty-three".