1243055497 has 2 divisors, whose sum is σ = 1243055498. Its totient is φ = 1243055496.

The previous prime is 1243055467. The next prime is 1243055509. The reversal of 1243055497 is 7945503421.

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., 685340041 + 557715456 = 26179^2 + 23616^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243055497 - 2⁷ = 1243055369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243055467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621527748 + 621527749.

It is an arithmetic number, because the mean of its divisors is an integer number (621527749).

Almost surely, 2^1243055497 is an apocalyptic number.

It is an amenable number.

1243055497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243055497 is an equidigital number, since it uses as much as digits as its factorization.

1243055497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 1243055497 is about 35256.9921717664. The cubic root of 1243055497 is about 1075.2187755925.

It can be divided in two parts, 124 and 3055497, that multiplied together give a triangular number (378881628 = T₂₇₅₂₇).

The spelling of 1243055497 in words is "one billion, two hundred forty-three million, fifty-five thousand, four hundred ninety-seven".