1230445042 has 4 divisors (see below), whose sum is σ = 1845667566. Its totient is φ = 615222520.

The previous prime is 1230445039. The next prime is 1230445061. The reversal of 1230445042 is 2405440321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2405440321 = 3229 ⋅744949.

It can be written as a sum of positive squares in only one way, i.e., 954253881 + 276191161 = 30891^2 + 16619^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1230444998 and 1230445016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307611259 + ... + 307611262.

Almost surely, 2^1230445042 is an apocalyptic number.

1230445042 is a deficient number, since it is larger than the sum of its proper divisors (615222524).

1230445042 is an equidigital number, since it uses as much as digits as its factorization.

1230445042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615222523.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1230445042 is about 35077.7000671367. The cubic root of 1230445042 is about 1071.5704780558.

Adding to 1230445042 its reverse (2405440321), we get a palindrome (3635885363).

The spelling of 1230445042 in words is "one billion, two hundred thirty million, four hundred forty-five thousand, forty-two".