1297722 has 16 divisors (see below), whose sum is σ = 2679552. Its totient is φ = 418560.

The previous prime is 1297693. The next prime is 1297727. The reversal of 1297722 is 2277921.

It is a happy number.

It is a d-powerful number, because it can be written as 1 + 2¹⁷ + 9² + 7³ + 7⁶ + 2¹⁹ + 2¹⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 1297722.

It is not an unprimeable number, because it can be changed into a prime (1297727) 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, 3303 + ... + 3674.

It is an arithmetic number, because the mean of its divisors is an integer number (167472).

2^1297722 is an apocalyptic number.

1297722 is an abundant number, since it is smaller than the sum of its proper divisors (1381830).

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

1297722 is a wasteful number, since it uses less digits than its factorization.

1297722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7013.

The product of its digits is 3528, while the sum is 30.

The square root of 1297722 is about 1139.1760180060. The cubic root of 1297722 is about 109.0755024960.

The spelling of 1297722 in words is "one million, two hundred ninety-seven thousand, seven hundred twenty-two".