1285491045 has 64 divisors (see below), whose sum is σ = 2194698240. Its totient is φ = 641169408.

The previous prime is 1285491029. The next prime is 1285491049. The reversal of 1285491045 is 5401945821.

It is not a de Polignac number, because 1285491045 - 2⁴ = 1285491029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1285490994 and 1285491012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285491049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3580576 + ... + 3580934.

It is an arithmetic number, because the mean of its divisors is an integer number (34292160).

Almost surely, 2^1285491045 is an apocalyptic number.

1285491045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285491045 is a deficient number, since it is larger than the sum of its proper divisors (909207195).

1285491045 is a wasteful number, since it uses less digits than its factorization.

1285491045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1285491045 is about 35853.7452018614. The cubic root of 1285491045 is about 1087.3174348046.

The spelling of 1285491045 in words is "one billion, two hundred eighty-five million, four hundred ninety-one thousand, forty-five".