1285722 has 12 divisors (see below), whose sum is σ = 2785770. Its totient is φ = 428568.

The previous prime is 1285717. The next prime is 1285741. The reversal of 1285722 is 2275821.

It can be written as a sum of positive squares in only one way, i.e., 1279161 + 6561 = 1131^2 + 81^2 .

It is a super-2 number, since 2×1285722² = 3306162122568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35697 + ... + 35732.

2^1285722 is an apocalyptic number.

1285722 is an abundant number, since it is smaller than the sum of its proper divisors (1500048).

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

1285722 is a wasteful number, since it uses less digits than its factorization.

1285722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71437 (or 71434 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 1285722 is about 1133.8968207028. The cubic root of 1285722 is about 108.7382547759.

Subtracting 1285722 from its reverse (2275821), we obtain a palindrome (990099).

The spelling of 1285722 in words is "one million, two hundred eighty-five thousand, seven hundred twenty-two".