1304020 has 24 divisors (see below), whose sum is σ = 2767464. Its totient is φ = 516096.

The previous prime is 1304003. The next prime is 1304029. The reversal of 1304020 is 204031.

It can be written as a sum of positive squares in 4 ways, for example, as 150544 + 1153476 = 388^2 + 1074^2 .

It is a super-3 number, since 3×1304020³ = 6652333471574424000, which contains 333 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 = 1303988 and 1304006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304029) 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, 1972 + ... + 2548.

It is an arithmetic number, because the mean of its divisors is an integer number (115311).

2^1304020 is an apocalyptic number.

1304020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1304020 is an abundant number, since it is smaller than the sum of its proper divisors (1463444).

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

1304020 is a wasteful number, since it uses less digits than its factorization.

1304020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1304020 is about 1141.9369509741. The cubic root of 1304020 is about 109.2516699663.

Adding to 1304020 its reverse (204031), we get a palindrome (1508051).

The spelling of 1304020 in words is "one million, three hundred four thousand, twenty".