1285013764 has 12 divisors (see below), whose sum is σ = 2251140444. Its totient is φ = 641830784.

The previous prime is 1285013761. The next prime is 1285013777. The reversal of 1285013764 is 4673105821.

It can be written as a sum of positive squares in 2 ways, for example, as 285948100 + 999065664 = 16910^2 + 31608^2 .

It is not an unprimeable number, because it can be changed into a prime (1285013761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164737 + ... + 172360.

It is an arithmetic number, because the mean of its divisors is an integer number (187595037).

Almost surely, 2^1285013764 is an apocalyptic number.

It is an amenable number.

1285013764 is a deficient number, since it is larger than the sum of its proper divisors (966126680).

1285013764 is a wasteful number, since it uses less digits than its factorization.

1285013764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338054 (or 338052 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1285013764 is about 35847.0886405019. The cubic root of 1285013764 is about 1087.1828506459.

The spelling of 1285013764 in words is "one billion, two hundred eighty-five million, thirteen thousand, seven hundred sixty-four".