1941257249 has 2 divisors, whose sum is σ = 1941257250. Its totient is φ = 1941257248.

The previous prime is 1941257243. The next prime is 1941257261. The reversal of 1941257249 is 9427521491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1796488225 + 144769024 = 42385^2 + 12032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1941257249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1941257243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970628624 + 970628625.

It is an arithmetic number, because the mean of its divisors is an integer number (970628625).

Almost surely, 2^1941257249 is an apocalyptic number.

It is an amenable number.

1941257249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941257249 is an equidigital number, since it uses as much as digits as its factorization.

1941257249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The square root of 1941257249 is about 44059.7009635790. The cubic root of 1941257249 is about 1247.4630677832.

The spelling of 1941257249 in words is "one billion, nine hundred forty-one million, two hundred fifty-seven thousand, two hundred forty-nine".