1425656144065 has 4 divisors (see below), whose sum is σ = 1710787372884. Its totient is φ = 1140524915248.

The previous prime is 1425656144047. The next prime is 1425656144083. The reversal of 1425656144065 is 5604416565241.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1425656144047) and next prime (1425656144083).

It can be written as a sum of positive squares in 2 ways, for example, as 296248338369 + 1129407805696 = 544287^2 + 1062736^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425656144065 - 2²³ = 1425647755457 is a prime.

It is a super-2 number, since 2×1425656144065² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142565614402 + ... + 142565614411.

It is an arithmetic number, because the mean of its divisors is an integer number (427696843221).

Almost surely, 2^{1425656144065} is an apocalyptic number.

It is an amenable number.

1425656144065 is a deficient number, since it is larger than the sum of its proper divisors (285131228819).

1425656144065 is an equidigital number, since it uses as much as digits as its factorization.

1425656144065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285131228818.

The product of its (nonzero) digits is 3456000, while the sum is 49.

The spelling of 1425656144065 in words is "one trillion, four hundred twenty-five billion, six hundred fifty-six million, one hundred forty-four thousand, sixty-five".