1249921103 has 2 divisors, whose sum is σ = 1249921104. Its totient is φ = 1249921102.

The previous prime is 1249921097. The next prime is 1249921139. The reversal of 1249921103 is 3011299421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1249921103 - 2¹⁰ = 1249920079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1249921103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249921163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624960551 + 624960552.

It is an arithmetic number, because the mean of its divisors is an integer number (624960552).

Almost surely, 2^1249921103 is an apocalyptic number.

1249921103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249921103 is an equidigital number, since it uses as much as digits as its factorization.

1249921103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1249921103 is about 35354.2232696463. The cubic root of 1249921103 is about 1077.1946807479.

The spelling of 1249921103 in words is "one billion, two hundred forty-nine million, nine hundred twenty-one thousand, one hundred three".