1371245549 has 2 divisors, whose sum is σ = 1371245550. Its totient is φ = 1371245548.

The previous prime is 1371245497. The next prime is 1371245563. The reversal of 1371245549 is 9455421731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1371220900 + 24649 = 37030^2 + 157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1371245549 is a prime.

It is a super-2 number, since 2×1371245549² = 3760628711304622802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1371242549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685622774 + 685622775.

It is an arithmetic number, because the mean of its divisors is an integer number (685622775).

Almost surely, 2^1371245549 is an apocalyptic number.

It is an amenable number.

1371245549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371245549 is an equidigital number, since it uses as much as digits as its factorization.

1371245549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 1371245549 is about 37030.3328232410. The cubic root of 1371245549 is about 1110.9770227897.

The spelling of 1371245549 in words is "one billion, three hundred seventy-one million, two hundred forty-five thousand, five hundred forty-nine".