1242175105 has 4 divisors (see below), whose sum is σ = 1490610132. Its totient is φ = 993740080.

The previous prime is 1242175097. The next prime is 1242175133. The reversal of 1242175105 is 5015712421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 913006656 + 329168449 = 30216^2 + 18143^2 .

It is not a de Polignac number, because 1242175105 - 2³ = 1242175097 is a prime.

It is a super-2 number, since 2×1242175105² = 3085997982963522050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124217506 + ... + 124217515.

It is an arithmetic number, because the mean of its divisors is an integer number (372652533).

Almost surely, 2^1242175105 is an apocalyptic number.

It is an amenable number.

1242175105 is a deficient number, since it is larger than the sum of its proper divisors (248435027).

1242175105 is an equidigital number, since it uses as much as digits as its factorization.

1242175105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248435026.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1242175105 is about 35244.5046071015. The cubic root of 1242175105 is about 1074.9648750016.

Adding to 1242175105 its reverse (5015712421), we get a palindrome (6257887526).

The spelling of 1242175105 in words is "one billion, two hundred forty-two million, one hundred seventy-five thousand, one hundred five".