1002420 has 36 divisors (see below), whose sum is σ = 3041220. Its totient is φ = 267264.

The previous prime is 1002403. The next prime is 1002427. The reversal of 1002420 is 242001.

It can be written as a sum of positive squares in 2 ways, for example, as 266256 + 736164 = 516^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2605 + ... + 2964.

2^1002420 is an apocalyptic number.

1002420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002420 is an abundant number, since it is smaller than the sum of its proper divisors (2038800).

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

1002420 is a wasteful number, since it uses less digits than its factorization.

1002420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5584 (or 5579 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1002420 is about 1001.2092688344. The cubic root of 1002420 is about 100.0806016829.

Adding to 1002420 its reverse (242001), we get a palindrome (1244421).

The spelling of 1002420 in words is "one million, two thousand, four hundred twenty".