1244404157 has 2 divisors, whose sum is σ = 1244404158. Its totient is φ = 1244404156.

The previous prime is 1244404127. The next prime is 1244404163. The reversal of 1244404157 is 7514044421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1220384356 + 24019801 = 34934^2 + 4901^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244404157 - 2⁶ = 1244404093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244404127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622202078 + 622202079.

It is an arithmetic number, because the mean of its divisors is an integer number (622202079).

Almost surely, 2^1244404157 is an apocalyptic number.

It is an amenable number.

1244404157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244404157 is an equidigital number, since it uses as much as digits as its factorization.

1244404157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 1244404157 is about 35276.1131220547. The cubic root of 1244404157 is about 1075.6074899178.

Adding to 1244404157 its reverse (7514044421), we get a palindrome (8758448578).

The spelling of 1244404157 in words is "one billion, two hundred forty-four million, four hundred four thousand, one hundred fifty-seven".