1240204051 has 2 divisors, whose sum is σ = 1240204052. Its totient is φ = 1240204050.

The previous prime is 1240204037. The next prime is 1240204057. The reversal of 1240204051 is 1504020421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1504020421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240204051 - 2²³ = 1231815443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240204057) 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, 620102025 + 620102026.

It is an arithmetic number, because the mean of its divisors is an integer number (620102026).

Almost surely, 2^1240204051 is an apocalyptic number.

1240204051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240204051 is an equidigital number, since it uses as much as digits as its factorization.

1240204051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1240204051 is about 35216.5309336397. The cubic root of 1240204051 is about 1074.3959977444.

Adding to 1240204051 its reverse (1504020421), we get a palindrome (2744224472).

The spelling of 1240204051 in words is "one billion, two hundred forty million, two hundred four thousand, fifty-one".