1285745361 has 8 divisors (see below), whose sum is σ = 1730055360. Its totient is φ = 849299472.

The previous prime is 1285745359. The next prime is 1285745369. The reversal of 1285745361 is 1635475821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1285745361 - 2¹ = 1285745359 is a prime.

It is a super-2 number, since 2×1285745361² = 3306282266666040642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1285745369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1965645 + ... + 1966298.

It is an arithmetic number, because the mean of its divisors is an integer number (216256920).

Almost surely, 2^1285745361 is an apocalyptic number.

It is an amenable number.

1285745361 is a deficient number, since it is larger than the sum of its proper divisors (444309999).

1285745361 is a wasteful number, since it uses less digits than its factorization.

1285745361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932055.

The product of its digits is 201600, while the sum is 42.

The square root of 1285745361 is about 35857.2916015697. The cubic root of 1285745361 is about 1087.3891334727.

The spelling of 1285745361 in words is "one billion, two hundred eighty-five million, seven hundred forty-five thousand, three hundred sixty-one".