1242877697 has 4 divisors (see below), whose sum is σ = 1242955776. Its totient is φ = 1242799620.

The previous prime is 1242877673. The next prime is 1242877721. The reversal of 1242877697 is 7967782421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (1242877673) and next prime (1242877721).

It is a cyclic number.

It is not a de Polignac number, because 1242877697 - 2¹⁰ = 1242876673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242877997) 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, 5633 + ... + 50174.

It is an arithmetic number, because the mean of its divisors is an integer number (310738944).

Almost surely, 2^1242877697 is an apocalyptic number.

It is an amenable number.

1242877697 is a deficient number, since it is larger than the sum of its proper divisors (78079).

1242877697 is an equidigital number, since it uses as much as digits as its factorization.

1242877697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78078.

The product of its digits is 2370816, while the sum is 53.

The square root of 1242877697 is about 35254.4705959400. The cubic root of 1242877697 is about 1075.1675086366.

The spelling of 1242877697 in words is "one billion, two hundred forty-two million, eight hundred seventy-seven thousand, six hundred ninety-seven".