1244255501 has 2 divisors, whose sum is σ = 1244255502. Its totient is φ = 1244255500.

The previous prime is 1244255479. The next prime is 1244255513. The reversal of 1244255501 is 1055524421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841290025 + 402965476 = 29005^2 + 20074^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244255501 - 2⁶ = 1244255437 is a prime.

It is a super-2 number, since 2×1244255501² = 3096343503537522002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244255521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622127750 + 622127751.

It is an arithmetic number, because the mean of its divisors is an integer number (622127751).

Almost surely, 2^1244255501 is an apocalyptic number.

It is an amenable number.

1244255501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244255501 is an equidigital number, since it uses as much as digits as its factorization.

1244255501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1244255501 is about 35274.0060242667. The cubic root of 1244255501 is about 1075.5646576720.

Adding to 1244255501 its reverse (1055524421), we get a palindrome (2299779922).

The spelling of 1244255501 in words is "one billion, two hundred forty-four million, two hundred fifty-five thousand, five hundred one".