1242065403 has 6 divisors (see below), whose sum is σ = 1794094484. Its totient is φ = 828043596.

The previous prime is 1242065401. The next prime is 1242065411. The reversal of 1242065403 is 3045602421.

1242065403 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 0 + 654 + 0 + 3 = 666.

It is not a de Polignac number, because 1242065403 - 2¹ = 1242065401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242065401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69003625 + ... + 69003642.

Almost surely, 2^1242065403 is an apocalyptic number.

1242065403 is a deficient number, since it is larger than the sum of its proper divisors (552029081).

1242065403 is a wasteful number, since it uses less digits than its factorization.

1242065403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138007273 (or 138007270 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1242065403 is about 35242.9482733780. The cubic root of 1242065403 is about 1074.9332290960.

Adding to 1242065403 its reverse (3045602421), we get a palindrome (4287667824).

The spelling of 1242065403 in words is "one billion, two hundred forty-two million, sixty-five thousand, four hundred three".