1425424225409 has 2 divisors, whose sum is σ = 1425424225410. Its totient is φ = 1425424225408.

The previous prime is 1425424225397. The next prime is 1425424225439. The reversal of 1425424225409 is 9045224245241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1229792281600 + 195631943809 = 1108960^2 + 442303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425424225409 - 2²⁰ = 1425423176833 is a prime.

It is a super-4 number, since 4×1425424225409⁴ (a number of 50 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1425424225409.

It is not a weakly prime, because it can be changed into another prime (1425424225439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712712112704 + 712712112705.

It is an arithmetic number, because the mean of its divisors is an integer number (712712112705).

Almost surely, 2^{1425424225409} is an apocalyptic number.

It is an amenable number.

1425424225409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425424225409 is an equidigital number, since it uses as much as digits as its factorization.

1425424225409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 1425424225409 in words is "one trillion, four hundred twenty-five billion, four hundred twenty-four million, two hundred twenty-five thousand, four hundred nine".