1242001697 has 2 divisors, whose sum is σ = 1242001698. Its totient is φ = 1242001696.

The previous prime is 1242001693. The next prime is 1242001729. The reversal of 1242001697 is 7961002421.

It is a happy number.

It is an a-pointer prime, because the next prime (1242001729) can be obtained adding 1242001697 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113156496 + 128845201 = 33364^2 + 11351^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242001697 - 2² = 1242001693 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242001693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621000848 + 621000849.

It is an arithmetic number, because the mean of its divisors is an integer number (621000849).

Almost surely, 2^1242001697 is an apocalyptic number.

It is an amenable number.

1242001697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242001697 is an equidigital number, since it uses as much as digits as its factorization.

1242001697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1242001697 is about 35242.0444497762. The cubic root of 1242001697 is about 1074.9148508724.

The spelling of 1242001697 in words is "one billion, two hundred forty-two million, one thousand, six hundred ninety-seven".