1249225783 has 16 divisors (see below), whose sum is σ = 1394414560. Its totient is φ = 1111625856.

The previous prime is 1249225781. The next prime is 1249225793. The reversal of 1249225783 is 3875229421.

It is a cyclic number.

It is not a de Polignac number, because 1249225783 - 2¹ = 1249225781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249225781) 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 in 15 ways as a sum of consecutive naturals, for example, 40516 + ... + 64342.

It is an arithmetic number, because the mean of its divisors is an integer number (87150910).

Almost surely, 2^1249225783 is an apocalyptic number.

1249225783 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1249225783 is a deficient number, since it is larger than the sum of its proper divisors (145188777).

1249225783 is a wasteful number, since it uses less digits than its factorization.

1249225783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23986.

The product of its digits is 241920, while the sum is 43.

The square root of 1249225783 is about 35344.3882815929. The cubic root of 1249225783 is about 1076.9948990889.

The spelling of 1249225783 in words is "one billion, two hundred forty-nine million, two hundred twenty-five thousand, seven hundred eighty-three".