1242235605 has 32 divisors (see below), whose sum is σ = 2146185216. Its totient is φ = 609928704.

The previous prime is 1242235597. The next prime is 1242235607. The reversal of 1242235605 is 5065322421.

It is not a de Polignac number, because 1242235605 - 2³ = 1242235597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242235607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66369 + ... + 83001.

It is an arithmetic number, because the mean of its divisors is an integer number (67068288).

Almost surely, 2^1242235605 is an apocalyptic number.

1242235605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242235605 is a deficient number, since it is larger than the sum of its proper divisors (903949611).

1242235605 is a wasteful number, since it uses less digits than its factorization.

1242235605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17037.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1242235605 is about 35245.3628864848. The cubic root of 1242235605 is about 1074.9823267331.

The spelling of 1242235605 in words is "one billion, two hundred forty-two million, two hundred thirty-five thousand, six hundred five".