1305020404 has 24 divisors (see below), whose sum is σ = 2304277920. Its totient is φ = 646672416.

The previous prime is 1305020363. The next prime is 1305020407. The reversal of 1305020404 is 4040205031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305020407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374679 + ... + 378145.

It is an arithmetic number, because the mean of its divisors is an integer number (96011580).

Almost surely, 2^1305020404 is an apocalyptic number.

It is an amenable number.

1305020404 is a deficient number, since it is larger than the sum of its proper divisors (999257516).

1305020404 is a wasteful number, since it uses less digits than its factorization.

1305020404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287 (or 4285 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1305020404 is about 36125.0661452682. The cubic root of 1305020404 is about 1092.7960099753.

Adding to 1305020404 its reverse (4040205031), we get a palindrome (5345225435).

The spelling of 1305020404 in words is "one billion, three hundred five million, twenty thousand, four hundred four".