1204001020 has 12 divisors (see below), whose sum is σ = 2528402184. Its totient is φ = 481600400.

The previous prime is 1204001017. The next prime is 1204001027. The reversal of 1204001020 is 201004021.

It is a super-2 number, since 2×1204001020² = 2899236912322080800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1204000988 and 1204001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204001027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30100006 + ... + 30100045.

It is an arithmetic number, because the mean of its divisors is an integer number (210700182).

Almost surely, 2^1204001020 is an apocalyptic number.

1204001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1204001020 is an abundant number, since it is smaller than the sum of its proper divisors (1324401164).

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

1204001020 is a wasteful number, since it uses less digits than its factorization.

1204001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60200060 (or 60200058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1204001020 is about 34698.7178437475. The cubic root of 1204001020 is about 1063.8382918454.

Adding to 1204001020 its reverse (201004021), we get a palindrome (1405005041).

The spelling of 1204001020 in words is "one billion, two hundred four million, one thousand, twenty".