1277453042 has 4 divisors (see below), whose sum is σ = 1916179566. Its totient is φ = 638726520.

The previous prime is 1277453039. The next prime is 1277453057. The reversal of 1277453042 is 2403547721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 678133681 + 599319361 = 26041^2 + 24481^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1277452993 and 1277453011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319363259 + ... + 319363262.

Almost surely, 2^1277453042 is an apocalyptic number.

1277453042 is a deficient number, since it is larger than the sum of its proper divisors (638726524).

1277453042 is an equidigital number, since it uses as much as digits as its factorization.

1277453042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638726523.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 1277453042 is about 35741.4750954686. The cubic root of 1277453042 is about 1085.0464114021.

The spelling of 1277453042 in words is "one billion, two hundred seventy-seven million, four hundred fifty-three thousand, forty-two".