1240016251 has 2 divisors, whose sum is σ = 1240016252. Its totient is φ = 1240016250.

The previous prime is 1240016231. The next prime is 1240016257. The reversal of 1240016251 is 1526100421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1240016251 - 2¹⁵ = 1239983483 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240016257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620008125 + 620008126.

It is an arithmetic number, because the mean of its divisors is an integer number (620008126).

Almost surely, 2^1240016251 is an apocalyptic number.

1240016251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240016251 is an equidigital number, since it uses as much as digits as its factorization.

1240016251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1240016251 is about 35213.8644712562. The cubic root of 1240016251 is about 1074.3417642619.

Adding to 1240016251 its reverse (1526100421), we get a palindrome (2766116672).

The spelling of 1240016251 in words is "one billion, two hundred forty million, sixteen thousand, two hundred fifty-one".