1263344145 has 32 divisors (see below), whose sum is σ = 2323980288. Its totient is φ = 574062528.

The previous prime is 1263344129. The next prime is 1263344153. The reversal of 1263344145 is 5414433621.

It is a happy number.

It is not a de Polignac number, because 1263344145 - 2⁴ = 1263344129 is a prime.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 18489 + ... + 53558.

It is an arithmetic number, because the mean of its divisors is an integer number (72624384).

Almost surely, 2^1263344145 is an apocalyptic number.

1263344145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1263344145 is a deficient number, since it is larger than the sum of its proper divisors (1060636143).

1263344145 is a wasteful number, since it uses less digits than its factorization.

1263344145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72229.

The product of its digits is 34560, while the sum is 33.

The square root of 1263344145 is about 35543.5527909071. The cubic root of 1263344145 is about 1081.0369969450.

Adding to 1263344145 its reverse (5414433621), we get a palindrome (6677777766).

The spelling of 1263344145 in words is "one billion, two hundred sixty-three million, three hundred forty-four thousand, one hundred forty-five".