1242175247 has 4 divisors (see below), whose sum is σ = 1242271680. Its totient is φ = 1242078816.

The previous prime is 1242175229. The next prime is 1242175273. The reversal of 1242175247 is 7425712421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1242175247 - 2¹⁶ = 1242109711 is a prime.

It is a super-2 number, since 2×1242175247² = 3085998688519022018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242175547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25247 + ... + 55872.

It is an arithmetic number, because the mean of its divisors is an integer number (310567920).

Almost surely, 2^1242175247 is an apocalyptic number.

1242175247 is a deficient number, since it is larger than the sum of its proper divisors (96433).

1242175247 is an equidigital number, since it uses as much as digits as its factorization.

1242175247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96432.

The product of its digits is 31360, while the sum is 35.

The square root of 1242175247 is about 35244.5066215999. The cubic root of 1242175247 is about 1074.9649159633.

Adding to 1242175247 its reverse (7425712421), we get a palindrome (8667887668).

The spelling of 1242175247 in words is "one billion, two hundred forty-two million, one hundred seventy-five thousand, two hundred forty-seven".