1335242921 has 2 divisors, whose sum is σ = 1335242922. Its totient is φ = 1335242920.

The previous prime is 1335242873. The next prime is 1335242929. The reversal of 1335242921 is 1292425331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1335098521 + 144400 = 36539^2 + 380^2 .

It is an emirp because it is prime and its reverse (1292425331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1335242921 is a prime.

It is a super-2 number, since 2×1335242921² = 3565747316161224482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1335242929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667621460 + 667621461.

It is an arithmetic number, because the mean of its divisors is an integer number (667621461).

Almost surely, 2^1335242921 is an apocalyptic number.

It is an amenable number.

1335242921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1335242921 is an equidigital number, since it uses as much as digits as its factorization.

1335242921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 1335242921 is about 36540.9759174546. The cubic root of 1335242921 is about 1101.1676089485.

The spelling of 1335242921 in words is "one billion, three hundred thirty-five million, two hundred forty-two thousand, nine hundred twenty-one".