1242871 has 4 divisors (see below), whose sum is σ = 1420432. Its totient is φ = 1065312.

The previous prime is 1242869. The next prime is 1242889. The reversal of 1242871 is 1782421.

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: 1782421 = 157 ⋅11353.

It is a cyclic number.

It is not a de Polignac number, because 1242871 - 2¹ = 1242869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242811) 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, 88770 + ... + 88783.

It is an arithmetic number, because the mean of its divisors is an integer number (355108).

2^1242871 is an apocalyptic number.

1242871 is a deficient number, since it is larger than the sum of its proper divisors (177561).

1242871 is an equidigital number, since it uses as much as digits as its factorization.

1242871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177560.

The product of its digits is 896, while the sum is 25.

The square root of 1242871 is about 1114.8412443034. The cubic root of 1242871 is about 107.5165577524.

The spelling of 1242871 in words is "one million, two hundred forty-two thousand, eight hundred seventy-one".