1242761768 has 8 divisors (see below), whose sum is σ = 2330178330. Its totient is φ = 621380880.

The previous prime is 1242761749. The next prime is 1242761789. The reversal of 1242761768 is 8671672421.

It can be written as a sum of positive squares in only one way, i.e., 1112756164 + 130005604 = 33358^2 + 11402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77672603 + ... + 77672618.

Almost surely, 2^1242761768 is an apocalyptic number.

It is an amenable number.

1242761768 is a deficient number, since it is larger than the sum of its proper divisors (1087416562).

1242761768 is a wasteful number, since it uses less digits than its factorization.

1242761768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155345227 (or 155345223 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 1242761768 is about 35252.8263831427. The cubic root of 1242761768 is about 1075.1340789677.

The spelling of 1242761768 in words is "one billion, two hundred forty-two million, seven hundred sixty-one thousand, seven hundred sixty-eight".