1242971707 has 4 divisors (see below), whose sum is σ = 1249839136. Its totient is φ = 1236104280.

The previous prime is 1242971699. The next prime is 1242971749. The reversal of 1242971707 is 7071792421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7071792421 = 69767 ⋅101363.

It is a cyclic number.

It is not a de Polignac number, because 1242971707 - 2³ = 1242971699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242971707.

It is not an unprimeable number, because it can be changed into a prime (1242921707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3433443 + ... + 3433804.

It is an arithmetic number, because the mean of its divisors is an integer number (312459784).

Almost surely, 2^1242971707 is an apocalyptic number.

1242971707 is a deficient number, since it is larger than the sum of its proper divisors (6867429).

1242971707 is an equidigital number, since it uses as much as digits as its factorization.

1242971707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867428.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 1242971707 is about 35255.8038768087. The cubic root of 1242971707 is about 1075.1946161440.

The spelling of 1242971707 in words is "one billion, two hundred forty-two million, nine hundred seventy-one thousand, seven hundred seven".