1242249 has 4 divisors (see below), whose sum is σ = 1656336. Its totient is φ = 828164.

The previous prime is 1242233. The next prime is 1242251. The reversal of 1242249 is 9422421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9422421 = 3 ⋅3140807.

It is a cyclic number.

It is not a de Polignac number, because 1242249 - 2⁴ = 1242233 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1242289) 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, 207039 + ... + 207044.

It is an arithmetic number, because the mean of its divisors is an integer number (414084).

2^1242249 is an apocalyptic number.

It is an amenable number.

1242249 is a deficient number, since it is larger than the sum of its proper divisors (414087).

1242249 is an equidigital number, since it uses as much as digits as its factorization.

1242249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414086.

The product of its digits is 1152, while the sum is 24.

The square root of 1242249 is about 1114.5622459064. The cubic root of 1242249 is about 107.4986190556.

The spelling of 1242249 in words is "one million, two hundred forty-two thousand, two hundred forty-nine".