1276091642 has 32 divisors (see below), whose sum is σ = 2351738880. Its totient is φ = 507083760.

The previous prime is 1276091639. The next prime is 1276091651. The reversal of 1276091642 is 2461906721.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1276091596 and 1276091605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38534 + ... + 63537.

It is an arithmetic number, because the mean of its divisors is an integer number (73491840).

Almost surely, 2^1276091642 is an apocalyptic number.

1276091642 is a deficient number, since it is larger than the sum of its proper divisors (1075647238).

1276091642 is a wasteful number, since it uses less digits than its factorization.

1276091642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102146.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1276091642 is about 35722.4249176900. The cubic root of 1276091642 is about 1084.6608245617.

The spelling of 1276091642 in words is "one billion, two hundred seventy-six million, ninety-one thousand, six hundred forty-two".