1299722 has 8 divisors (see below), whose sum is σ = 2016900. Its totient is φ = 627424.

The previous prime is 1299721. The next prime is 1299743. The reversal of 1299722 is 2279921.

It can be written as a sum of positive squares in 2 ways, for example, as 1297321 + 2401 = 1139^2 + 49^2 .

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

It is an Ulam number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1299721) 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, 11147 + ... + 11262.

2^1299722 is an apocalyptic number.

1299722 is a deficient number, since it is larger than the sum of its proper divisors (717178).

1299722 is a wasteful number, since it uses less digits than its factorization.

1299722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22440.

The product of its digits is 4536, while the sum is 32.

The square root of 1299722 is about 1140.0535075162. The cubic root of 1299722 is about 109.1315080791.

The spelling of 1299722 in words is "one million, two hundred ninety-nine thousand, seven hundred twenty-two".