1425656709 has 12 divisors (see below), whose sum is σ = 2060082700. Its totient is φ = 950068224.

The previous prime is 1425656653. The next prime is 1425656711. The reversal of 1425656709 is 9076565241.

1425656709 is a `hidden beast` number, since 14 + 2 + 565 + 6 + 70 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25250625 + 1400406084 = 5025^2 + 37422^2 .

It is not a de Polignac number, because 1425656709 - 2⁷ = 1425656581 is a prime.

It is a super-3 number, since 3×1425656709³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425656779) 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 in 11 ways as a sum of consecutive naturals, for example, 5254 + ... + 53655.

Almost surely, 2^1425656709 is an apocalyptic number.

It is an amenable number.

1425656709 is a deficient number, since it is larger than the sum of its proper divisors (634425991).

1425656709 is a wasteful number, since it uses less digits than its factorization.

1425656709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61604 (or 61601 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The square root of 1425656709 is about 37757.8694976292. The cubic root of 1425656709 is about 1125.4813963477.

The spelling of 1425656709 in words is "one billion, four hundred twenty-five million, six hundred fifty-six thousand, seven hundred nine".