1242124065 has 80 divisors (see below), whose sum is σ = 2740539648. Its totient is φ = 524133504.

The previous prime is 1242124021. The next prime is 1242124067. The reversal of 1242124065 is 5604212421.

1242124065 is a `hidden beast` number, since 1 + 242 + 12 + 406 + 5 = 666.

It is not a de Polignac number, because 1242124065 - 2⁷ = 1242123937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1242124067) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 20004 + ... + 53706.

Almost surely, 2^1242124065 is an apocalyptic number.

1242124065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1242124065 is an abundant number, since it is smaller than the sum of its proper divisors (1498415583).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242124065 is a wasteful number, since it uses less digits than its factorization.

1242124065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33740 (or 33731 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1242124065 is about 35243.7805151491. The cubic root of 1242124065 is about 1074.9501516456.

Adding to 1242124065 its reverse (5604212421), we get a palindrome (6846336486).

The spelling of 1242124065 in words is "one billion, two hundred forty-two million, one hundred twenty-four thousand, sixty-five".