1242534605 has 16 divisors (see below), whose sum is σ = 1612006704. Its totient is φ = 913981440.

The previous prime is 1242534593. The next prime is 1242534617. The reversal of 1242534605 is 5064352421.

It is an interprime number because it is at equal distance from previous prime (1242534593) and next prime (1242534617).

It can be written as a sum of positive squares in 8 ways, for example, as 2579236 + 1239955369 = 1606^2 + 35213^2 .

It is not a de Polignac number, because 1242534605 - 2²⁴ = 1225757389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20486 + ... + 53895.

It is an arithmetic number, because the mean of its divisors is an integer number (100750419).

Almost surely, 2^1242534605 is an apocalyptic number.

It is an amenable number.

1242534605 is a deficient number, since it is larger than the sum of its proper divisors (369472099).

1242534605 is a wasteful number, since it uses less digits than its factorization.

1242534605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74656.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1242534605 is about 35249.6043240204. The cubic root of 1242534605 is about 1075.0685674671.

The spelling of 1242534605 in words is "one billion, two hundred forty-two million, five hundred thirty-four thousand, six hundred five".