1004005420 has 24 divisors (see below), whose sum is σ = 2300085648. Its totient is φ = 365092800.

The previous prime is 1004005411. The next prime is 1004005421. The reversal of 1004005420 is 245004001.

It is a junction number, because it is equal to n+sod(n) for n = 1004005394 and 1004005403.

It is not an unprimeable number, because it can be changed into a prime (1004005421) 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, 2281611 + ... + 2282050.

It is an arithmetic number, because the mean of its divisors is an integer number (95836902).

Almost surely, 2^1004005420 is an apocalyptic number.

1004005420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1004005420 is an abundant number, since it is smaller than the sum of its proper divisors (1296080228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1004005420 is a wasteful number, since it uses less digits than its factorization.

1004005420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4563681 (or 4563679 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1004005420 is about 31686.0445622359. The cubic root of 1004005420 is about 1001.3333613573. Note that the first 4 decimals are identical.

Adding to 1004005420 its reverse (245004001), we get a palindrome (1249009421).

The spelling of 1004005420 in words is "one billion, four million, five thousand, four hundred twenty".