1240401401 has 2 divisors, whose sum is σ = 1240401402. Its totient is φ = 1240401400.

The previous prime is 1240401397. The next prime is 1240401439. The reversal of 1240401401 is 1041040421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1233765625 + 6635776 = 35125^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240401401 - 2² = 1240401397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240401401.

It is not a weakly prime, because it can be changed into another prime (1240401901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620200700 + 620200701.

It is an arithmetic number, because the mean of its divisors is an integer number (620200701).

Almost surely, 2^1240401401 is an apocalyptic number.

It is an amenable number.

1240401401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240401401 is an equidigital number, since it uses as much as digits as its factorization.

1240401401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1240401401 is about 35219.3327733505. The cubic root of 1240401401 is about 1074.4529832069.

Adding to 1240401401 its reverse (1041040421), we get a palindrome (2281441822).

The spelling of 1240401401 in words is "one billion, two hundred forty million, four hundred one thousand, four hundred one".