1299742 has 4 divisors (see below), whose sum is σ = 1949616. Its totient is φ = 649870.

The previous prime is 1299721. The next prime is 1299743. The reversal of 1299742 is 2479921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2479921 = 271 ⋅9151.

It is a junction number, because it is equal to n+sod(n) for n = 1299698 and 1299707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324934 + ... + 324937.

It is an arithmetic number, because the mean of its divisors is an integer number (487404).

2^1299742 is an apocalyptic number.

1299742 is a deficient number, since it is larger than the sum of its proper divisors (649874).

1299742 is an equidigital number, since it uses as much as digits as its factorization.

1299742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649873.

The product of its digits is 9072, while the sum is 34.

The square root of 1299742 is about 1140.0622790006. The cubic root of 1299742 is about 109.1320678447.

The spelling of 1299742 in words is "one million, two hundred ninety-nine thousand, seven hundred forty-two".