1293030921 has 64 divisors (see below), whose sum is σ = 2255052800. Its totient is φ = 639933696.

The previous prime is 1293030887. The next prime is 1293030929. The reversal of 1293030921 is 1290303921.

It is a happy number.

It is not a de Polignac number, because 1293030921 - 2¹¹ = 1293028873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1293030929) 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 63 ways as a sum of consecutive naturals, for example, 564240 + ... + 566526.

It is an arithmetic number, because the mean of its divisors is an integer number (35235200).

Almost surely, 2^1293030921 is an apocalyptic number.

It is an amenable number.

1293030921 is a deficient number, since it is larger than the sum of its proper divisors (962021879).

1293030921 is a wasteful number, since it uses less digits than its factorization.

1293030921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1293030921 is about 35958.7391464161. The cubic root of 1293030921 is about 1089.4391304091.

The spelling of 1293030921 in words is "one billion, two hundred ninety-three million, thirty thousand, nine hundred twenty-one".