1275011385 has 16 divisors (see below), whose sum is σ = 2041243584. Its totient is φ = 679597632.

The previous prime is 1275011267. The next prime is 1275011393. The reversal of 1275011385 is 5831105721.

It is not a de Polignac number, because 1275011385 - 2²¹ = 1272914233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1179 + ... + 50511.

It is an arithmetic number, because the mean of its divisors is an integer number (127577724).

Almost surely, 2^1275011385 is an apocalyptic number.

1275011385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1275011385 is a deficient number, since it is larger than the sum of its proper divisors (766232199).

1275011385 is a wasteful number, since it uses less digits than its factorization.

1275011385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51064.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 1275011385 is about 35707.3015642459. The cubic root of 1275011385 is about 1084.3546701557.

The spelling of 1275011385 in words is "one billion, two hundred seventy-five million, eleven thousand, three hundred eighty-five".