1240204001 has 2 divisors, whose sum is σ = 1240204002. Its totient is φ = 1240204000.

The previous prime is 1240203997. The next prime is 1240204037. The reversal of 1240204001 is 1004020421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1160083600 + 80120401 = 34060^2 + 8951^2 .

It is an emirp because it is prime and its reverse (1004020421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240204001 - 2² = 1240203997 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240204051) 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 as a sum of consecutive naturals, namely, 620102000 + 620102001.

It is an arithmetic number, because the mean of its divisors is an integer number (620102001).

Almost surely, 2^1240204001 is an apocalyptic number.

It is an amenable number.

1240204001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240204001 is an equidigital number, since it uses as much as digits as its factorization.

1240204001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1240204001 is about 35216.5302237458. The cubic root of 1240204001 is about 1074.3959833059.

Adding to 1240204001 its reverse (1004020421), we get a palindrome (2244224422).

The spelling of 1240204001 in words is "one billion, two hundred forty million, two hundred four thousand, one".