1353240421 has 8 divisors (see below), whose sum is σ = 1458739800. Its totient is φ = 1247941632.

The previous prime is 1353240419. The next prime is 1353240437. The reversal of 1353240421 is 1240423531.

It can be written as a sum of positive squares in 4 ways, for example, as 10824100 + 1342416321 = 3290^2 + 36639^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1353240421 - 2¹ = 1353240419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353240491) 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, 35980 + ... + 63253.

It is an arithmetic number, because the mean of its divisors is an integer number (182342475).

Almost surely, 2^1353240421 is an apocalyptic number.

It is an amenable number.

1353240421 is a deficient number, since it is larger than the sum of its proper divisors (105499379).

1353240421 is a wasteful number, since it uses less digits than its factorization.

1353240421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100295.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1353240421 is about 36786.4162565477. The cubic root of 1353240421 is about 1106.0930254631.

Adding to 1353240421 its reverse (1240423531), we get a palindrome (2593663952).

The spelling of 1353240421 in words is "one billion, three hundred fifty-three million, two hundred forty thousand, four hundred twenty-one".