1425155609 has 2 divisors, whose sum is σ = 1425155610. Its totient is φ = 1425155608.

The previous prime is 1425155569. The next prime is 1425155617. The reversal of 1425155609 is 9065515241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1321686025 + 103469584 = 36355^2 + 10172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425155609 - 2⁸ = 1425155353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1425155659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712577804 + 712577805.

It is an arithmetic number, because the mean of its divisors is an integer number (712577805).

Almost surely, 2^1425155609 is an apocalyptic number.

It is an amenable number.

1425155609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425155609 is an equidigital number, since it uses as much as digits as its factorization.

1425155609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 1425155609 is about 37751.2332116449. The cubic root of 1425155609 is about 1125.3495168159.

The spelling of 1425155609 in words is "one billion, four hundred twenty-five million, one hundred fifty-five thousand, six hundred nine".