1304440042 has 8 divisors (see below), whose sum is σ = 1957630500. Its totient is φ = 651896544.

The previous prime is 1304440037. The next prime is 1304440057. The reversal of 1304440042 is 2400444031.

It can be written as a sum of positive squares in 2 ways, for example, as 1239814521 + 64625521 = 35211^2 + 8039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1304439995 and 1304440022.

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, 156667 + ... + 164782.

Almost surely, 2^1304440042 is an apocalyptic number.

1304440042 is a deficient number, since it is larger than the sum of its proper divisors (653190458).

1304440042 is a wasteful number, since it uses less digits than its factorization.

1304440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323480.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1304440042 is about 36117.0325746731. The cubic root of 1304440042 is about 1092.6339917380.

Adding to 1304440042 its reverse (2400444031), we get a palindrome (3704884073).

The spelling of 1304440042 in words is "one billion, three hundred four million, four hundred forty thousand, forty-two".