1353021 has 8 divisors (see below), whose sum is σ = 1882560. Its totient is φ = 862752.

The previous prime is 1353019. The next prime is 1353029. The reversal of 1353021 is 1203531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1353021 - 2¹ = 1353019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9736 + ... + 9873.

It is an arithmetic number, because the mean of its divisors is an integer number (235320).

2^1353021 is an apocalyptic number.

It is an amenable number.

1353021 is a deficient number, since it is larger than the sum of its proper divisors (529539).

1353021 is a wasteful number, since it uses less digits than its factorization.

1353021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19635.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1353021 is about 1163.1943087894. The cubic root of 1353021 is about 110.6033239793.

Adding to 1353021 its reverse (1203531), we get a palindrome (2556552).

The spelling of 1353021 in words is "one million, three hundred fifty-three thousand, twenty-one".