1335240021 has 8 divisors (see below), whose sum is σ = 1780537120. Its totient is φ = 890051472.

The previous prime is 1335240013. The next prime is 1335240031. The reversal of 1335240021 is 1200425331.

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

It is not a de Polignac number, because 1335240021 - 2³ = 1335240013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1335240021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1335240001) 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, 8106 + ... + 52308.

It is an arithmetic number, because the mean of its divisors is an integer number (222567140).

Almost surely, 2^1335240021 is an apocalyptic number.

It is an amenable number.

1335240021 is a deficient number, since it is larger than the sum of its proper divisors (445297099).

1335240021 is a wasteful number, since it uses less digits than its factorization.

1335240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54275.

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

The square root of 1335240021 is about 36540.9362359532. The cubic root of 1335240021 is about 1101.1668117431.

Adding to 1335240021 its reverse (1200425331), we get a palindrome (2535665352).

The spelling of 1335240021 in words is "one billion, three hundred thirty-five million, two hundred forty thousand, twenty-one".