1274785905 has 16 divisors (see below), whose sum is σ = 2147008320. Its totient is φ = 644102208.

The previous prime is 1274785873. The next prime is 1274785913. The reversal of 1274785905 is 5095874721.

It is not a de Polignac number, because 1274785905 - 2⁵ = 1274785873 is a prime.

It is a Curzon number.

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, 2236182 + ... + 2236751.

It is an arithmetic number, because the mean of its divisors is an integer number (134188020).

Almost surely, 2^1274785905 is an apocalyptic number.

1274785905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1274785905 is a deficient number, since it is larger than the sum of its proper divisors (872222415).

1274785905 is a wasteful number, since it uses less digits than its factorization.

1274785905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472960.

The product of its (nonzero) digits is 705600, while the sum is 48.

The square root of 1274785905 is about 35704.1440872065. The cubic root of 1274785905 is about 1084.2907453133.

The spelling of 1274785905 in words is "one billion, two hundred seventy-four million, seven hundred eighty-five thousand, nine hundred five".