1425818 has 4 divisors (see below), whose sum is σ = 2138730. Its totient is φ = 712908.

The previous prime is 1425811. The next prime is 1425821. The reversal of 1425818 is 8185241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8185241 = 89 ⋅91969.

It can be written as a sum of positive squares in only one way, i.e., 1283689 + 142129 = 1133^2 + 377^2 .

It is not an unprimeable number, because it can be changed into a prime (1425811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356453 + ... + 356456.

2^1425818 is an apocalyptic number.

1425818 is a deficient number, since it is larger than the sum of its proper divisors (712912).

1425818 is an equidigital number, since it uses as much as digits as its factorization.

1425818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712911.

The product of its digits is 2560, while the sum is 29.

The square root of 1425818 is about 1194.0762119731. The cubic root of 1425818 is about 112.5523838350.

The spelling of 1425818 in words is "one million, four hundred twenty-five thousand, eight hundred eighteen".