1242774173 has 4 divisors (see below), whose sum is σ = 1308183360. Its totient is φ = 1177364988.

The previous prime is 1242774107. The next prime is 1242774191. The reversal of 1242774173 is 3714772421.

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.

It is a cyclic number.

It is not a de Polignac number, because 1242774173 - 2¹⁶ = 1242708637 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 (1242774193) 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, 32704565 + ... + 32704602.

It is an arithmetic number, because the mean of its divisors is an integer number (327045840).

Almost surely, 2^1242774173 is an apocalyptic number.

It is an amenable number.

1242774173 is a deficient number, since it is larger than the sum of its proper divisors (65409187).

1242774173 is an equidigital number, since it uses as much as digits as its factorization.

1242774173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65409186.

The product of its digits is 65856, while the sum is 38.

The square root of 1242774173 is about 35253.0023260431. The cubic root of 1242774173 is about 1075.1376562138.

The spelling of 1242774173 in words is "one billion, two hundred forty-two million, seven hundred seventy-four thousand, one hundred seventy-three".