1371742249 has 2 divisors, whose sum is σ = 1371742250. Its totient is φ = 1371742248.

The previous prime is 1371742217. The next prime is 1371742261. The reversal of 1371742249 is 9422471731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 724955625 + 646786624 = 26925^2 + 25432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1371742249 - 2⁵ = 1371742217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1371742349) 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, 685871124 + 685871125.

It is an arithmetic number, because the mean of its divisors is an integer number (685871125).

Almost surely, 2^1371742249 is an apocalyptic number.

It is an amenable number.

1371742249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371742249 is an equidigital number, since it uses as much as digits as its factorization.

1371742249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 1371742249 is about 37037.0388800185. The cubic root of 1371742249 is about 1111.1111479707. Note that the first 4 decimals are identical.

The spelling of 1371742249 in words is "one billion, three hundred seventy-one million, seven hundred forty-two thousand, two hundred forty-nine".