1247242 has 4 divisors (see below), whose sum is σ = 1870866. Its totient is φ = 623620.

The previous prime is 1247231. The next prime is 1247243. The reversal of 1247242 is 2427421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 758641 + 488601 = 871^2 + 699^2 .

It is a super-2 number, since 2×1247242² = 3111225213128, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 1 + 2 + 4⁸ + 7 + 2¹¹ + 4¹⁰ + 2¹⁷ .

It is not an unprimeable number, because it can be changed into a prime (1247243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311809 + ... + 311812.

2^1247242 is an apocalyptic number.

1247242 is a deficient number, since it is larger than the sum of its proper divisors (623624).

1247242 is an equidigital number, since it uses as much as digits as its factorization.

1247242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623623.

The product of its digits is 896, while the sum is 22.

The square root of 1247242 is about 1116.7998925501. The cubic root of 1247242 is about 107.6424504172.

The spelling of 1247242 in words is "one million, two hundred forty-seven thousand, two hundred forty-two".