1275425538 has 16 divisors (see below), whose sum is σ = 2594086560. Its totient is φ = 417935936.

The previous prime is 1275425519. The next prime is 1275425573. The reversal of 1275425538 is 8355245721.

It is a self number, because there is not a number n which added to its sum of digits gives 1275425538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1801095 + ... + 1801802.

It is an arithmetic number, because the mean of its divisors is an integer number (162130410).

Almost surely, 2^1275425538 is an apocalyptic number.

1275425538 is an abundant number, since it is smaller than the sum of its proper divisors (1318661022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275425538 is a wasteful number, since it uses less digits than its factorization.

1275425538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602961.

The product of its digits is 336000, while the sum is 42.

The square root of 1275425538 is about 35713.1003694723. The cubic root of 1275425538 is about 1084.4720652182.

The spelling of 1275425538 in words is "one billion, two hundred seventy-five million, four hundred twenty-five thousand, five hundred thirty-eight".