1243040097 has 32 divisors (see below), whose sum is σ = 1905361920. Its totient is φ = 714450240.

The previous prime is 1243040081. The next prime is 1243040147. The reversal of 1243040097 is 7900403421.

It is a happy number.

It is not a de Polignac number, because 1243040097 - 2⁴ = 1243040081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243040597) 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 in 31 ways as a sum of consecutive naturals, for example, 40798 + ... + 64424.

It is an arithmetic number, because the mean of its divisors is an integer number (59542560).

Almost surely, 2^1243040097 is an apocalyptic number.

It is an amenable number.

1243040097 is a deficient number, since it is larger than the sum of its proper divisors (662321823).

1243040097 is a wasteful number, since it uses less digits than its factorization.

1243040097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23733.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1243040097 is about 35256.7737746947. The cubic root of 1243040097 is about 1075.2143353409.

The spelling of 1243040097 in words is "one billion, two hundred forty-three million, forty thousand, ninety-seven".