1242266871 has 8 divisors (see below), whose sum is σ = 1660727680. Its totient is φ = 825991992.

The previous prime is 1242266849. The next prime is 1242266887. The reversal of 1242266871 is 1786622421.

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

It is not a de Polignac number, because 1242266871 - 2¹⁷ = 1242135799 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 (1242266801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545155 + ... + 547428.

It is an arithmetic number, because the mean of its divisors is an integer number (207590960).

Almost surely, 2^1242266871 is an apocalyptic number.

1242266871 is a deficient number, since it is larger than the sum of its proper divisors (418460809).

1242266871 is a wasteful number, since it uses less digits than its factorization.

1242266871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092965.

The product of its digits is 64512, while the sum is 39.

The square root of 1242266871 is about 35245.8064314040. The cubic root of 1242266871 is about 1074.9913454504.

The spelling of 1242266871 in words is "one billion, two hundred forty-two million, two hundred sixty-six thousand, eight hundred seventy-one".