1425643273 has 4 divisors (see below), whose sum is σ = 1509504660. Its totient is φ = 1341781888.

The previous prime is 1425643253. The next prime is 1425643319. The reversal of 1425643273 is 3723465241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3723465241 = 83 ⋅44861027.

It can be written as a sum of positive squares in 2 ways, for example, as 762477769 + 663165504 = 27613^2 + 25752^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425643273 - 2¹⁷ = 1425512201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425643253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41930668 + ... + 41930701.

It is an arithmetic number, because the mean of its divisors is an integer number (377376165).

Almost surely, 2^1425643273 is an apocalyptic number.

It is an amenable number.

1425643273 is a deficient number, since it is larger than the sum of its proper divisors (83861387).

1425643273 is an equidigital number, since it uses as much as digits as its factorization.

1425643273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83861386.

The product of its digits is 120960, while the sum is 37.

The square root of 1425643273 is about 37757.6915740356. The cubic root of 1425643273 is about 1125.4778606635.

The spelling of 1425643273 in words is "one billion, four hundred twenty-five million, six hundred forty-three thousand, two hundred seventy-three".