1020404 has 24 divisors (see below), whose sum is σ = 2227008. Its totient is φ = 397440.

The previous prime is 1020401. The next prime is 1020407. The reversal of 1020404 is 4040201.

1020404 = T₂₃₂ + T₂₃₃ + ... + T₂₆₄.

It is an interprime number because it is at equal distance from previous prime (1020401) and next prime (1020407).

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020401) 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, 1349 + ... + 1964.

It is an arithmetic number, because the mean of its divisors is an integer number (92792).

2^1020404 is an apocalyptic number.

1020404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1020404 is an abundant number, since it is smaller than the sum of its proper divisors (1206604).

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

1020404 is a wasteful number, since it uses less digits than its factorization.

1020404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335 (or 3333 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1020404 is about 1010.1504838389. The cubic root of 1020404 is about 100.6755592532.

Adding to 1020404 its reverse (4040201), we get a palindrome (5060605).

The spelling of 1020404 in words is "one million, twenty thousand, four hundred four".