103145491 has 2 divisors, whose sum is σ = 103145492. Its totient is φ = 103145490.

The previous prime is 103145467. The next prime is 103145503. The reversal of 103145491 is 194541301.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 103145491 - 2¹⁷ = 103014419 is a prime.

It is not a weakly prime, because it can be changed into another prime (103145411) 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, 51572745 + 51572746.

It is an arithmetic number, because the mean of its divisors is an integer number (51572746).

Almost surely, 2^103145491 is an apocalyptic number.

103145491 is a deficient number, since it is larger than the sum of its proper divisors (1).

103145491 is an equidigital number, since it uses as much as digits as its factorization.

103145491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 103145491 is about 10156.0568627790. The cubic root of 103145491 is about 468.9754216279.

Adding to 103145491 its reverse (194541301), we get a palindrome (297686792).

The spelling of 103145491 in words is "one hundred three million, one hundred forty-five thousand, four hundred ninety-one".