1242045135 has 12 divisors (see below), whose sum is σ = 2152878312. Its totient is φ = 662424048.

The previous prime is 1242045121. The next prime is 1242045139. The reversal of 1242045135 is 5315402421.

1242045135 is a `hidden beast` number, since 124 + 20 + 4 + 513 + 5 = 666.

It is not a de Polignac number, because 1242045135 - 2⁶ = 1242045071 is a prime.

It is a super-2 number, since 2×1242045135² = 3085352234754336450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1242045099 and 1242045108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242045139) 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 11 ways as a sum of consecutive naturals, for example, 13800457 + ... + 13800546.

It is an arithmetic number, because the mean of its divisors is an integer number (179406526).

Almost surely, 2^1242045135 is an apocalyptic number.

1242045135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242045135 is a deficient number, since it is larger than the sum of its proper divisors (910833177).

1242045135 is a wasteful number, since it uses less digits than its factorization.

1242045135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27601014 (or 27601011 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1242045135 is about 35242.6607253198. The cubic root of 1242045135 is about 1074.9273821507.

Adding to 1242045135 its reverse (5315402421), we get a palindrome (6557447556).

The spelling of 1242045135 in words is "one billion, two hundred forty-two million, forty-five thousand, one hundred thirty-five".