1425142661 has 2 divisors, whose sum is σ = 1425142662. Its totient is φ = 1425142660.

The previous prime is 1425142603. The next prime is 1425142673. The reversal of 1425142661 is 1662415241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 765628900 + 659513761 = 27670^2 + 25681^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425142661 - 2³⁰ = 351400837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1425142561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712571330 + 712571331.

It is an arithmetic number, because the mean of its divisors is an integer number (712571331).

Almost surely, 2^1425142661 is an apocalyptic number.

It is an amenable number.

1425142661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425142661 is an equidigital number, since it uses as much as digits as its factorization.

1425142661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 1425142661 is about 37751.0617201689. The cubic root of 1425142661 is about 1125.3461087508.

The spelling of 1425142661 in words is "one billion, four hundred twenty-five million, one hundred forty-two thousand, six hundred sixty-one".