1242700117 has 2 divisors, whose sum is σ = 1242700118. Its totient is φ = 1242700116.

The previous prime is 1242700091. The next prime is 1242700127. The reversal of 1242700117 is 7110072421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1225980196 + 16719921 = 35014^2 + 4089^2 .

It is an emirp because it is prime and its reverse (7110072421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242700117 - 2⁷ = 1242699989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242700091 and 1242700100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242700127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621350058 + 621350059.

It is an arithmetic number, because the mean of its divisors is an integer number (621350059).

Almost surely, 2^1242700117 is an apocalyptic number.

It is an amenable number.

1242700117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242700117 is an equidigital number, since it uses as much as digits as its factorization.

1242700117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 1242700117 is about 35251.9519601397. The cubic root of 1242700117 is about 1075.1163002352.

Adding to 1242700117 its reverse (7110072421), we get a palindrome (8352772538).

The spelling of 1242700117 in words is "one billion, two hundred forty-two million, seven hundred thousand, one hundred seventeen".