1249039901 has 2 divisors, whose sum is σ = 1249039902. Its totient is φ = 1249039900.

The previous prime is 1249039819. The next prime is 1249039931. The reversal of 1249039901 is 1099309421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243972900 + 5067001 = 35270^2 + 2251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249039901 - 2¹⁰ = 1249038877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249039931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624519950 + 624519951.

It is an arithmetic number, because the mean of its divisors is an integer number (624519951).

Almost surely, 2^1249039901 is an apocalyptic number.

It is an amenable number.

1249039901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249039901 is an equidigital number, since it uses as much as digits as its factorization.

1249039901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1249039901 is about 35341.7586008393. The cubic root of 1249039901 is about 1076.9414782959.

The spelling of 1249039901 in words is "one billion, two hundred forty-nine million, thirty-nine thousand, nine hundred one".