1285645722 has 8 divisors (see below), whose sum is σ = 2571291456. Its totient is φ = 428548572.

The previous prime is 1285645717. The next prime is 1285645727. The reversal of 1285645722 is 2275465821.

It is an interprime number because it is at equal distance from previous prime (1285645717) and next prime (1285645727).

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

1285645722 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1285645727) 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, 107137138 + ... + 107137149.

It is an arithmetic number, because the mean of its divisors is an integer number (321411432).

Almost surely, 2^1285645722 is an apocalyptic number.

1285645722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285645722 is a wasteful number, since it uses less digits than its factorization.

1285645722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214274292.

The product of its digits is 268800, while the sum is 42.

The square root of 1285645722 is about 35855.9021919683. The cubic root of 1285645722 is about 1087.3610436274.

The spelling of 1285645722 in words is "one billion, two hundred eighty-five million, six hundred forty-five thousand, seven hundred twenty-two".