1352340021 has 16 divisors (see below), whose sum is σ = 1911470400. Its totient is φ = 847511808.

The previous prime is 1352339921. The next prime is 1352340061. The reversal of 1352340021 is 1200432531.

It is not a de Polignac number, because 1352340021 - 2¹⁰ = 1352338997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1352340021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1352340061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28375 + ... + 59243.

It is an arithmetic number, because the mean of its divisors is an integer number (119466900).

Almost surely, 2^1352340021 is an apocalyptic number.

It is an amenable number.

1352340021 is a deficient number, since it is larger than the sum of its proper divisors (559130379).

1352340021 is a wasteful number, since it uses less digits than its factorization.

1352340021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31748.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1352340021 is about 36774.1760070841. The cubic root of 1352340021 is about 1105.8476521819.

Adding to 1352340021 its reverse (1200432531), we get a palindrome (2552772552).

The spelling of 1352340021 in words is "one billion, three hundred fifty-two million, three hundred forty thousand, twenty-one".